icosihenagon

== English == === Etymology === From Ancient Greek εἰκοσιέν (eikosién, “twenty-one”) +‎ -gon, from εἴκοσι (eíkosi) (twenty) + ἕν (hén) (one). === Pronunciation === Hyphenation: i‧co‧si‧hen‧a‧gon === Noun === icosihenagon (plural icosihenagons) (geometry) A polygon with twenty-one edges and twenty-one angles. ==== Synonyms ==== 21-gon ==== Translations ====