octadecagon

Noun

 * 1)  A polygon with 18 sides and 18 vertices.
 * A regular octadecagon cannot be constructed using a compass and straightedge.

Translations

 * Belarusian: васемнаццацікутнік
 * Bulgarian: осемнадесетоъгълник
 * Catalan: octodecàgon
 * Chinese:
 * Mandarin:
 * Czech:
 * Dutch:
 * Esperanto: dekoklatero
 * Finnish: 18-kulmio
 * French:
 * Galician:
 * Georgian: თვრამეტკუთხედი
 * German:
 * Greek: δεκαοκτάγωνο
 * Hungarian: tizennyolcszög
 * Italian:
 * Japanese: 十八角形
 * Korean: 십팔각형
 * Macedonian: осумнаесетаголник
 * Polish: osiemnastokąt
 * Portuguese:
 * Romanian: octodecagon
 * Russian:
 * Serbo-Croatian:
 * Cyrillic: осамнаестоугао
 * Roman: osamnaestougao
 * Slovene: osemnajstkotnik
 * Spanish:
 * Swedish: oktadekagon
 * Thai: รูปสิบแปดเหลี่ยม
 * Turkish: onsekizgen
 * Ukrainian: вісімнадцятикутник