# icosihenagon

> English word · Noun

## Definitions
1. A polygon with twenty-one edges and twenty-one angles.

## Etymology
From Ancient Greek εἰκοσιέν (eikosién, “twenty-one”) + -gon, from εἴκοσι (eíkosi) (twenty) + ἕν (hén) (one).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/icosihenagon