undecagon

[ uhn-dek-uh-gon, -guhn ]

noun

1. a polygon having 11 angles and 11 sides.

undecagon

/ ʌnˈdɛkəˌɡɒn /

noun

1. a polygon having eleven sides

Word History and Origins

Origin of undecagon¹

1720–30; < Latin un-, as in undecim eleven ( ūn ( us ) one + -decim, combining form of decem ten ) + decagon

Word History and Origins

Origin of undecagon¹

C18: from Latin undecim eleven (from unus one + decem ten) + -gon