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mw-ui-icon-search mw-ui-icon-wikimedia-search"></span> <span>Hledání</span> </a> <div class="vector-typeahead-search-container"> <div class="cdx-typeahead-search cdx-typeahead-search--show-thumbnail cdx-typeahead-search--auto-expand-width"> <form action="/w/index.php" id="searchform" class="cdx-search-input cdx-search-input--has-end-button"> <div id="simpleSearch" class="cdx-search-input__input-wrapper" data-search-loc="header-moved"> <div class="cdx-text-input cdx-text-input--has-start-icon"> <input class="cdx-text-input__input" type="search" name="search" placeholder="Hledat na Wikipedii" aria-label="Hledat na Wikipedii" autocapitalize="sentences" title="Prohledat tuto wiki [f]" accesskey="f" id="searchInput" > <span class="cdx-text-input__icon cdx-text-input__start-icon"></span> </div> <input type="hidden" name="title" value="Speciální:Hledání"> </div> <button class="cdx-button cdx-search-input__end-button">Hledat</button> </form> </div> </div> </div> <nav class="vector-user-links vector-user-links-wide" aria-label="Osobní nástroje"> <div class="vector-user-links-main"> <div id="p-vector-user-menu-preferences" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-userpage" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <nav class="vector-appearance-landmark" aria-label="Vzhled"> <div id="vector-appearance-dropdown" class="vector-dropdown " title="Změnit vzhled velikosti písma, šířky stránky a barvy" > <input type="checkbox" id="vector-appearance-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-appearance-dropdown" class="vector-dropdown-checkbox " aria-label="Vzhled" > <label id="vector-appearance-dropdown-label" for="vector-appearance-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-appearance mw-ui-icon-wikimedia-appearance"></span> <span class="vector-dropdown-label-text">Vzhled</span> </label> <div class="vector-dropdown-content"> <div id="vector-appearance-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <div id="p-vector-user-menu-notifications" class="vector-menu mw-portlet emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> <div id="p-vector-user-menu-overflow" class="vector-menu mw-portlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=cs.wikipedia.org&uselang=cs" class=""><span>Podpořte Wikipedii</span></a> </li> <li id="pt-createaccount-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speci%C3%A1ln%C3%AD:Vytvo%C5%99it_%C3%BA%C4%8Det&returnto=Spir%C3%A1la" title="Doporučujeme vytvořit si účet a přihlásit se, ovšem není to povinné" class=""><span>Vytvoření účtu</span></a> </li> <li id="pt-login-2" class="user-links-collapsible-item mw-list-item user-links-collapsible-item"><a data-mw="interface" href="/w/index.php?title=Speci%C3%A1ln%C3%AD:P%C5%99ihl%C3%A1sit&returnto=Spir%C3%A1la" title="Doporučujeme vám přihlásit se, ovšem není to povinné. [o]" accesskey="o" class=""><span>Přihlášení</span></a> </li> </ul> </div> </div> </div> <div id="vector-user-links-dropdown" class="vector-dropdown vector-user-menu vector-button-flush-right vector-user-menu-logged-out" title="Další možnosti" > <input type="checkbox" id="vector-user-links-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-user-links-dropdown" class="vector-dropdown-checkbox " aria-label="Osobní nástroje" > <label id="vector-user-links-dropdown-label" for="vector-user-links-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-ellipsis mw-ui-icon-wikimedia-ellipsis"></span> <span class="vector-dropdown-label-text">Osobní nástroje</span> </label> <div class="vector-dropdown-content"> <div id="p-personal" class="vector-menu mw-portlet mw-portlet-personal user-links-collapsible-item" title="Uživatelské menu" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-sitesupport" class="user-links-collapsible-item mw-list-item"><a href="https://donate.wikimedia.org/?wmf_source=donate&wmf_medium=sidebar&wmf_campaign=cs.wikipedia.org&uselang=cs"><span>Podpořte Wikipedii</span></a></li><li id="pt-createaccount" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speci%C3%A1ln%C3%AD:Vytvo%C5%99it_%C3%BA%C4%8Det&returnto=Spir%C3%A1la" title="Doporučujeme vytvořit si účet a přihlásit se, ovšem není to povinné"><span class="vector-icon mw-ui-icon-userAdd mw-ui-icon-wikimedia-userAdd"></span> <span>Vytvoření účtu</span></a></li><li id="pt-login" class="user-links-collapsible-item mw-list-item"><a href="/w/index.php?title=Speci%C3%A1ln%C3%AD:P%C5%99ihl%C3%A1sit&returnto=Spir%C3%A1la" title="Doporučujeme vám přihlásit se, ovšem není to povinné. [o]" accesskey="o"><span class="vector-icon mw-ui-icon-logIn mw-ui-icon-wikimedia-logIn"></span> <span>Přihlášení</span></a></li> </ul> </div> </div> <div id="p-user-menu-anon-editor" class="vector-menu mw-portlet mw-portlet-user-menu-anon-editor" > <div class="vector-menu-heading"> Stránky pro odhlášené editory <a href="/wiki/N%C3%A1pov%C4%9Bda:%C3%9Avod" aria-label="Více informací o editování"><span>dozvědět se více</span></a> </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="pt-anoncontribs" class="mw-list-item"><a href="/wiki/Speci%C3%A1ln%C3%AD:Moje_p%C5%99%C3%ADsp%C4%9Bvky" title="Seznam editací provedených z této IP adresy [y]" accesskey="y"><span>Příspěvky</span></a></li><li id="pt-anontalk" class="mw-list-item"><a href="/wiki/Speci%C3%A1ln%C3%AD:Moje_diskuse" title="Diskuse o editacích provedených z této IP adresy [n]" accesskey="n"><span>Diskuse</span></a></li> </ul> </div> </div> </div> </div> </nav> </div> </header> </div> <div class="mw-page-container"> <div class="mw-page-container-inner"> <div class="vector-sitenotice-container"> <div id="siteNotice"></div> </div> <div class="vector-column-start"> <div class="vector-main-menu-container"> <div id="mw-navigation"> <nav id="mw-panel" class="vector-main-menu-landmark" aria-label="Projekt"> <div id="vector-main-menu-pinned-container" class="vector-pinned-container"> </div> </nav> </div> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Spirála</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Přejděte k článku v jiném jazyce. Je dostupný v 51 jazycích" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-51" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">51 jazyků</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Spiraal" title="Spiraal – afrikánština" lang="af" hreflang="af" data-title="Spiraal" data-language-autonym="Afrikaans" data-language-local-name="afrikánština" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AD%D9%84%D8%B2%D9%88%D9%86_(%D9%87%D9%86%D8%AF%D8%B3%D8%A9)" title="حلزون (هندسة) – arabština" lang="ar" hreflang="ar" data-title="حلزون (هندسة)" data-language-autonym="العربية" data-language-local-name="arabština" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Spiral" title="Spiral – ázerbájdžánština" lang="az" hreflang="az" data-title="Spiral" data-language-autonym="Azərbaycanca" data-language-local-name="ázerbájdžánština" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A1%D0%BF%D1%96%D1%80%D0%B0%D0%BB%D1%8C" title="Спіраль – běloruština" lang="be" hreflang="be" data-title="Спіраль" data-language-autonym="Беларуская" data-language-local-name="běloruština" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B8%D1%80%D0%B0%D0%BB%D0%B0" title="Спирала – bulharština" lang="bg" hreflang="bg" data-title="Спирала" data-language-autonym="Български" data-language-local-name="bulharština" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%B8%E0%A6%B0%E0%A7%8D%E0%A6%AA%E0%A6%BF%E0%A6%B2" title="সর্পিল – bengálština" lang="bn" hreflang="bn" data-title="সর্পিল" data-language-autonym="বাংলা" data-language-local-name="bengálština" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Spirala" title="Spirala – bosenština" lang="bs" hreflang="bs" data-title="Spirala" data-language-autonym="Bosanski" data-language-local-name="bosenština" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Espiral" title="Espiral – katalánština" lang="ca" hreflang="ca" data-title="Espiral" data-language-autonym="Català" data-language-local-name="katalánština" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D9%84%D9%88%D9%88%D9%84%D9%BE%DB%8E%DA%86_(%D9%85%D8%A7%D8%AA%D9%85%D8%A7%D8%AA%DB%8C%DA%A9)" title="لوولپێچ (ماتماتیک) – kurdština (sorání)" lang="ckb" hreflang="ckb" data-title="لوولپێچ (ماتماتیک)" data-language-autonym="کوردی" data-language-local-name="kurdština (sorání)" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B8%D1%80%D0%B0%D0%BB%D1%8C" title="Спираль – čuvaština" lang="cv" hreflang="cv" data-title="Спираль" data-language-autonym="Чӑвашла" data-language-local-name="čuvaština" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Sbiral" title="Sbiral – velština" lang="cy" hreflang="cy" data-title="Sbiral" data-language-autonym="Cymraeg" data-language-local-name="velština" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Spiral_(matematik)" title="Spiral (matematik) – dánština" lang="da" hreflang="da" data-title="Spiral (matematik)" data-language-autonym="Dansk" data-language-local-name="dánština" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Spirale" title="Spirale – němčina" lang="de" hreflang="de" data-title="Spirale" data-language-autonym="Deutsch" data-language-local-name="němčina" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Spiral" title="Spiral – angličtina" lang="en" hreflang="en" data-title="Spiral" data-language-autonym="English" data-language-local-name="angličtina" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Spiralo" title="Spiralo – esperanto" lang="eo" hreflang="eo" data-title="Spiralo" data-language-autonym="Esperanto" data-language-local-name="esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Espiral" title="Espiral – španělština" lang="es" hreflang="es" data-title="Espiral" data-language-autonym="Español" data-language-local-name="španělština" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Spiraal" title="Spiraal – estonština" lang="et" hreflang="et" data-title="Spiraal" data-language-autonym="Eesti" data-language-local-name="estonština" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Kiribil" title="Kiribil – baskičtina" lang="eu" hreflang="eu" data-title="Kiribil" data-language-autonym="Euskara" data-language-local-name="baskičtina" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%85%D8%A7%D8%B1%D9%BE%DB%8C%DA%86" title="مارپیچ – perština" lang="fa" hreflang="fa" data-title="مارپیچ" data-language-autonym="فارسی" data-language-local-name="perština" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Spiraali" title="Spiraali – finština" lang="fi" hreflang="fi" data-title="Spiraali" data-language-autonym="Suomi" data-language-local-name="finština" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Spirale" title="Spirale – francouzština" lang="fr" hreflang="fr" data-title="Spirale" data-language-autonym="Français" data-language-local-name="francouzština" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Spiraal_(wiskunde)" title="Spiraal (wiskunde) – fríština (západní)" lang="fy" hreflang="fy" data-title="Spiraal (wiskunde)" data-language-autonym="Frysk" data-language-local-name="fríština (západní)" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Espiral" title="Espiral – galicijština" lang="gl" hreflang="gl" data-title="Espiral" data-language-autonym="Galego" data-language-local-name="galicijština" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A1%D7%A4%D7%99%D7%A8%D7%9C%D7%94" title="ספירלה – hebrejština" lang="he" hreflang="he" data-title="ספירלה" data-language-autonym="עברית" data-language-local-name="hebrejština" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%B8%E0%A4%B0%E0%A5%8D%E0%A4%AA%E0%A4%BF%E0%A4%B2" title="सर्पिल – hindština" lang="hi" hreflang="hi" data-title="सर्पिल" data-language-autonym="हिन्दी" data-language-local-name="hindština" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Spir%C3%A1l" title="Spirál – maďarština" lang="hu" hreflang="hu" data-title="Spirál" data-language-autonym="Magyar" data-language-local-name="maďarština" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Pilin" title="Pilin – indonéština" lang="id" hreflang="id" data-title="Pilin" data-language-autonym="Bahasa Indonesia" data-language-local-name="indonéština" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Spiralo" title="Spiralo – ido" lang="io" hreflang="io" data-title="Spiralo" data-language-autonym="Ido" data-language-local-name="ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Ku%C3%B0ungsferill" title="Kuðungsferill – islandština" lang="is" hreflang="is" data-title="Kuðungsferill" data-language-autonym="Íslenska" data-language-local-name="islandština" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Spirale" title="Spirale – italština" lang="it" hreflang="it" data-title="Spirale" data-language-autonym="Italiano" data-language-local-name="italština" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E6%B8%A6%E5%B7%BB" title="渦巻 – japonština" lang="ja" hreflang="ja" data-title="渦巻" data-language-autonym="日本語" data-language-local-name="japonština" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%A8%D0%B8%D1%8B%D1%80%D1%88%D1%8B%D2%9B" title="Шиыршық – kazaština" lang="kk" hreflang="kk" data-title="Шиыршық" data-language-autonym="Қазақша" data-language-local-name="kazaština" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%99%80%EC%84%A0" title="와선 – korejština" lang="ko" hreflang="ko" data-title="와선" data-language-autonym="한국어" data-language-local-name="korejština" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Spiralis" title="Spiralis – latina" lang="la" hreflang="la" data-title="Spiralis" data-language-autonym="Latina" data-language-local-name="latina" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Spiraal_(wiskunde)" title="Spiraal (wiskunde) – nizozemština" lang="nl" hreflang="nl" data-title="Spiraal (wiskunde)" data-language-autonym="Nederlands" data-language-local-name="nizozemština" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Spiral" title="Spiral – norština (nynorsk)" lang="nn" hreflang="nn" data-title="Spiral" data-language-autonym="Norsk nynorsk" data-language-local-name="norština (nynorsk)" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Spiral" title="Spiral – norština (bokmål)" lang="nb" hreflang="nb" data-title="Spiral" data-language-autonym="Norsk bokmål" data-language-local-name="norština (bokmål)" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Espiral" title="Espiral – portugalština" lang="pt" hreflang="pt" data-title="Espiral" data-language-autonym="Português" data-language-local-name="portugalština" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D0%BF%D0%B8%D1%80%D0%B0%D0%BB%D1%8C" title="Спираль – ruština" lang="ru" hreflang="ru" data-title="Спираль" data-language-autonym="Русский" data-language-local-name="ruština" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Spirala" title="Spirala – srbochorvatština" lang="sh" hreflang="sh" data-title="Spirala" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="srbochorvatština" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Spiral" title="Spiral – Simple English" lang="en-simple" hreflang="en-simple" data-title="Spiral" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/%C5%A0pir%C3%A1la_(matematika)" title="Špirála (matematika) – slovenština" lang="sk" hreflang="sk" data-title="Špirála (matematika)" data-language-autonym="Slovenčina" data-language-local-name="slovenština" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Spirala" title="Spirala – slovinština" lang="sl" hreflang="sl" data-title="Spirala" data-language-autonym="Slovenščina" data-language-local-name="slovinština" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Spiral" title="Spiral – švédština" lang="sv" hreflang="sv" data-title="Spiral" data-language-autonym="Svenska" data-language-local-name="švédština" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Sinuso_(hugis)" title="Sinuso (hugis) – tagalog" lang="tl" hreflang="tl" data-title="Sinuso (hugis)" data-language-autonym="Tagalog" data-language-local-name="tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Spiral" title="Spiral – turečtina" lang="tr" hreflang="tr" data-title="Spiral" data-language-autonym="Türkçe" data-language-local-name="turečtina" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A1%D0%BF%D1%96%D1%80%D0%B0%D0%BB%D1%8C" title="Спіраль – ukrajinština" lang="uk" hreflang="uk" data-title="Спіраль" data-language-autonym="Українська" data-language-local-name="ukrajinština" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Spirallar" title="Spirallar – uzbečtina" lang="uz" hreflang="uz" data-title="Spirallar" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="uzbečtina" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Xo%E1%BA%AFn_%E1%BB%91c" title="Xoắn ốc – vietnamština" lang="vi" hreflang="vi" data-title="Xoắn ốc" data-language-autonym="Tiếng Việt" data-language-local-name="vietnamština" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%9E%BA%E7%BA%BF" title="螺线 – čínština" lang="zh" hreflang="zh" data-title="螺线" data-language-autonym="中文" data-language-local-name="čínština" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%9E%BA%E7%B7%9A" title="螺線 – kantonština" lang="yue" hreflang="yue" data-title="螺線" data-language-autonym="粵語" data-language-local-name="kantonština" class="interlanguage-link-target"><span>粵語</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q189114#sitelinks-wikipedia" title="Editovat mezijazykové odkazy" class="wbc-editpage">Upravit odkazy</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Jmenné prostory"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Spir%C3%A1la" title="Zobrazit obsahovou stránku [c]" accesskey="c"><span>Článek</span></a></li><li id="ca-talk" class="vector-tab-noicon mw-list-item"><a href="/wiki/Diskuse:Spir%C3%A1la" rel="discussion" title="Diskuse ke stránce [t]" accesskey="t"><span>Diskuse</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" 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href="/wiki/Speci%C3%A1ln%C3%AD:Co_odkazuje_na/Spir%C3%A1la" title="Seznam všech wikistránek, které sem odkazují [j]" accesskey="j"><span>Odkazuje sem</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Speci%C3%A1ln%C3%AD:Souvisej%C3%ADc%C3%AD_zm%C4%9Bny/Spir%C3%A1la" rel="nofollow" title="Nedávné změny stránek, na které je odkazováno [k]" accesskey="k"><span>Související změny</span></a></li><li id="t-upload" class="mw-list-item"><a href="//commons.wikimedia.org/wiki/Special:UploadWizard?uselang=cs" title="Nahrát obrázky či jiná multimédia [u]" accesskey="u"><span>Načíst soubor</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Spir%C3%A1la&oldid=23538648" title="Trvalý odkaz na současnou verzi této stránky"><span>Trvalý odkaz</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Spir%C3%A1la&action=info" title="Více informací o této stránce"><span>Informace o stránce</span></a></li><li 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href="/w/index.php?title=Speci%C3%A1ln%C3%AD:Kniha&bookcmd=book_creator&referer=Spir%C3%A1la"><span>Vytvořit knihu</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Speci%C3%A1ln%C3%AD:DownloadAsPdf&page=Spir%C3%A1la&action=show-download-screen"><span>Stáhnout jako PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Spir%C3%A1la&printable=yes" title="Tato stránka v podobě vhodné k tisku [p]" accesskey="p"><span>Verze k tisku</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Na jiných projektech </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Spiral" hreflang="en"><span>Wikimedia Commons</span></a></li><li id="t-wikibase" class="wb-otherproject-link 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data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Vzhled</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">přesunout do postranního panelu</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">skrýt</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Z Wikipedie, otevřené encyklopedie</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cs" dir="ltr"><div class="uvodni-upozorneni hatnote noprint">Tento článek je o <a href="/wiki/K%C5%99ivka" title="Křivka">křivce</a>. Další významy jsou uvedeny na stránce <a href="/wiki/Spir%C3%A1la_(rozcestn%C3%ADk)" class="mw-disambig" title="Spirála (rozcestník)">Spirála (rozcestník)</a>.</div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Soubor:ContextFreeTutorial_01Spiral.png" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/ContextFreeTutorial_01Spiral.png/220px-ContextFreeTutorial_01Spiral.png" decoding="async" width="220" height="202" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/cf/ContextFreeTutorial_01Spiral.png/330px-ContextFreeTutorial_01Spiral.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/cf/ContextFreeTutorial_01Spiral.png/440px-ContextFreeTutorial_01Spiral.png 2x" data-file-width="545" data-file-height="501" /></a><figcaption>Příklad spirály</figcaption></figure> <p><b>Spirála</b> je <a href="/wiki/K%C5%99ivka" title="Křivka">křivka</a>, která obíhá pevně daný ústřední bod (<i>pól spirály</i>) a přitom se od tohoto bodu soustavně vzdaluje. Formální matematická definice, která by zahrnovala všechny spirály, neexistuje (na rozdíl např. od kuželoseček). </p><p>Mezi důležité spirály patří: </p> <ul><li><a href="/wiki/Archim%C3%A9dova_spir%C3%A1la" title="Archimédova spirála">Archimédova spirála</a></li> <li><a href="/w/index.php?title=Fermatova_spir%C3%A1la&action=edit&redlink=1" class="new" title="Fermatova spirála (stránka neexistuje)">Fermatova spirála</a></li> <li><a href="/wiki/Hyperbolick%C3%A1_spir%C3%A1la" title="Hyperbolická spirála">hyperbolická spirála</a></li> <li><a href="/w/index.php?title=Hyperbolick%C3%A1_platformick%C3%A1_spir%C3%A1la&action=edit&redlink=1" class="new" title="Hyperbolická platformická spirála (stránka neexistuje)">hyperbolická platformická spirála</a></li> <li><a href="/wiki/Klotoida" title="Klotoida">klotoida</a> (též Eulerova nebo Cornuova spirála)</li> <li><a href="/w/index.php?title=Lituus&action=edit&redlink=1" class="new" title="Lituus (stránka neexistuje)">lituus</a></li> <li><a href="/wiki/Logaritmick%C3%A1_spir%C3%A1la" title="Logaritmická spirála">logaritmická spirála</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Odkazy">Odkazy</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spir%C3%A1la&veaction=edit&section=1" title="Editace sekce: Odkazy" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Spir%C3%A1la&action=edit&section=1" title="Editovat zdrojový kód sekce Odkazy"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-heading mw-heading3"><h3 id="Literatura">Literatura</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spir%C3%A1la&veaction=edit&section=2" title="Editace sekce: Literatura" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Spir%C3%A1la&action=edit&section=2" title="Editovat zdrojový kód sekce Literatura"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li>JAREŠOVÁ, Miroslava a VOLF, Ivo. <i>Matematika křivek: studijní text pro soutěžící FO a ostatní zájemce o fyziku.</i> Hradec Králové: MAFY, 2006. 64 s. Knihovnička fyzikální olympiády, č. 73. <a href="/wiki/Speci%C3%A1ln%C3%AD:Zdroje_knih/8086148831" class="internal mw-magiclink-isbn">ISBN 80-86148-83-1</a>. Dostupné také z: <a rel="nofollow" class="external free" href="http://fyzikalniolympiada.cz/texty/matematika/mkrivek.pdf">http://fyzikalniolympiada.cz/texty/matematika/mkrivek.pdf</a></li> <li>Cook, T., 1903. <i>Spirals in nature and art</i>. Nature 68 (1761), 296. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Cook, T., 1979. <i>The curves of life</i>. Dover, New York. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Dimulyo, S., Habib, Z., Sakai, M., 2009. <i>Fair cubic transition between two circles with one circle inside or tangent to the other</i>. Numerical Algorithms 51, 461–476 <a rel="nofollow" class="external autonumber" href="http://www.springerlink.com/content/113644325114041q/">[1]</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20181127024818/http://www.springerlink.com/content/113644325114041q/">Archivováno</a> 27. 11. 2018 na <a href="/wiki/Internet_Archive" title="Internet Archive">Wayback Machine</a>.. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Farin, G., 2006. <i>Class A Bézier curves</i>. Computer Aided Geometric Design 23 (7), 573–581 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/S016783960600032X">[2]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Farouki, R.T., 1997. <i>Pythagorean-hodograph quintic transition curves of monotone curvature</i>. Computer-Aided Design 29 (9), 601–606. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Habib, Z., Sakai, M., 2005. <i>Spiral transition curves and their applications</i>. Scientiae Mathematicae Japonicae 61 (2), 195–206. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Harary, G., Tal, A., 2011. <i>The natural 3D spiral</i>. Computer Graphics Forum 30 (2), 237–246 <a rel="nofollow" class="external autonumber" href="http://webee.technion.ac.il/~ayellet/Ps/11-HararyTal.pdf">[3]</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20151122013249/http://webee.technion.ac.il/~ayellet/Ps/11-HararyTal.pdf">Archivováno</a> 22. 11. 2015 na <a href="/wiki/Internet_Archive" title="Internet Archive">Wayback Machine</a>.. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Kurnosenko, A. <i>Applying inversion to construct planar, rational spirals that satisfy two-point G2 Hermite data</i>. Computer Aided Geometric Design, 27(3), 262–280, 2010 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/S0167839609001423">[4]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Kurnosenko, A. <i>Two-point G2 Hermite interpolation with spirals by inversion of hyperbola</i>. Computer Aided Geometric Design, 27(6), 474–481, 2010. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Meek, D., Walton, D., 1989. <i>The use of Cornu spirals in drawing planar curves of controlled curvature</i>. Journal of Computational and Applied Mathematics 25 (1), 69–78 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/0377042789900769">[5]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Miura, K. T., 2006. <i>A general equation of aesthetic curves and its self-affinity</i>. Computer-Aided Design and Applications 3 (1–4), 457–464 <a rel="nofollow" class="external autonumber" href="https://web.archive.org/web/20130628000547/http://ktm11.eng.shizuoka.ac.jp/profile/ktmiura/pdf/KTMiura-CAD06Final.pdf">[6]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Miura, K., Sone, J., Yamashita, A., Kaneko, T., 2005. <i>Derivation of a general formula of aesthetic curves</i>. In: 8th International Conference on Humans and Computers (HC2005). Aizu-Wakamutsu, Japan, 166–171 <a rel="nofollow" class="external autonumber" href="https://web.archive.org/web/20130628051506/http://ktm11.eng.shizuoka.ac.jp/profile/ktmiura/pdf/acurveHC0.pdf">[7]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Wang, Y., Zhao, B., Zhang, L., Xu, J., Wang, K., Wang, S., 2004. <i>Designing fair curves using monotone curvature pieces</i>. Computer Aided Geometric Design 21 (5), 515–527 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/S0167839604000470">[8]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Xu, L., Mould, D., 2009. <i>Magnetic curves: curvature-controlled aesthetic curves using magnetic ﬁelds</i>. In: Deussen, O., Hall, P. (eds.), Computational Aesthetics in Graphics, Visualization, and Imaging. The Eurographics Association <a rel="nofollow" class="external autonumber" href="http://gigl.scs.carleton.ca/sites/default/files/ling_xu/artn-cae.pdf">[9]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Yoshida, N., Saito, T., 2006. <i>Interactive aesthetic curve segments</i>. The Visual Computer 22 (9), 896–905 <a rel="nofollow" class="external autonumber" href="http://www.yoshida-lab.net/aesthetic/ias2006pg.pdf">[10]</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160304064701/http://www.yoshida-lab.net/aesthetic/ias2006pg.pdf">Archivováno</a> 4. 3. 2016 na <a href="/wiki/Internet_Archive" title="Internet Archive">Wayback Machine</a>.. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Yoshida, N., Saito, T., 2007. <i>Quasi-aesthetic curves in rational cubic Bézier forms</i>. Computer-Aided Design and Applications 4 (9–10), 477–486 <a rel="nofollow" class="external autonumber" href="http://www.yoshida-lab.net/aesthetic/cad07yoshida.pdf">[11]</a> <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160303205632/http://www.yoshida-lab.net/aesthetic/cad07yoshida.pdf">Archivováno</a> 3. 3. 2016 na <a href="/wiki/Internet_Archive" title="Internet Archive">Wayback Machine</a>.. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Ziatdinov, R., Yoshida, N., Kim, T., 2012. <i>Analytic parametric equations of log-aesthetic curves in terms of incomplete gamma functions</i>. Computer Aided Geometric Design 29 (2), 129–140 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/S0167839611001452">[12]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Ziatdinov, R., Yoshida, N., Kim, T., 2012. <i>Fitting G2 multispiral transition curve joining two straight lines</i>, Computer-Aided Design 44(6), 591–596 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/S001044851200019X">[13]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Ziatdinov, R., 2012. <i>Family of superspirals with completely monotonic curvature given in terms of Gauss hypergeometric function</i>. Computer Aided Geometric Design 29 (7): 510–518 <a rel="nofollow" class="external autonumber" href="http://www.sciencedirect.com/science/article/pii/S0167839612000325">[14]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li> <li>Ziatdinov, R., Miura K.T., 2012. <i>On the Variety of Planar Spirals and Their Applications in Computer Aided Design</i>. European Researcher 27 (8-2), 1227–1232 <a rel="nofollow" class="external autonumber" href="http://www.erjournal.ru/pdf.html?n=1345307278.pdf">[15]</a>. <span style="cursor:help;" data-lang="en" title="Jazyk cíle odkazu: angličtina">(anglicky)</span></li></ul> <div class="mw-heading mw-heading3"><h3 id="Související_články"><span id="Souvisej.C3.ADc.C3.AD_.C4.8Dl.C3.A1nky"></span>Související články</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spir%C3%A1la&veaction=edit&section=3" title="Editace sekce: Související články" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Spir%C3%A1la&action=edit&section=3" title="Editovat zdrojový kód sekce Související články"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Cykloida" title="Cykloida">Cykloida</a></li> <li><a href="/wiki/Evolventa" title="Evolventa">Evolventa</a></li> <li><a href="/wiki/%C5%A0roubovice" title="Šroubovice">Šroubovice</a></li></ul> <div class="mw-heading mw-heading3"><h3 id="Externí_odkazy"><span id="Extern.C3.AD_odkazy"></span>Externí odkazy</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Spir%C3%A1la&veaction=edit&section=4" title="Editace sekce: Externí odkazy" class="mw-editsection-visualeditor"><span>editovat</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Spir%C3%A1la&action=edit&section=4" title="Editovat zdrojový kód sekce Externí odkazy"><span>editovat zdroj</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span class="sisterproject sisterproject-wiktionary"><span class="sisterproject_image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/Wiktionary-logo-cs.svg/16px-Wiktionary-logo-cs.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/Wiktionary-logo-cs.svg/24px-Wiktionary-logo-cs.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/97/Wiktionary-logo-cs.svg/32px-Wiktionary-logo-cs.svg.png 2x" data-file-width="411" data-file-height="411" /></span></span></span> <span class="sisterproject_text"><span class="sisterproject_text_prefix">Slovníkové heslo </span><span class="sisterproject_text_target"><a href="https://cs.wiktionary.org/wiki/spir%C3%A1la" class="extiw" title="wikt:spirála">spirála</a></span><span class="sisterproject_text_suffix"> ve Wikislovníku</span></span></span></li> <li><span class="sisterproject sisterproject-commons"><span class="sisterproject_image"><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" 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