icosagon

noun

1. A polygon with twenty sides and twenty angles.

   1993 The upper half of a regular icosagon frame is folded. - author? - Space Structures 4

Where it comes from

From Ancient Greek εἰκοσάγωνος (eikoságōnos, “having twenty sides”), from εἴκοσι (eíkosi, “twenty”) + γωνία (gōnía, “angle”). Equivalent to icosa- + -gon.

Adapted from the Wiktionary entry icosagon (CC BY-SA 4.0).

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