undecagon

American

[uhn-dek-uh-gon, -guhn] / ʌnˈdɛk əˌgɒn, -gən /

noun

a polygon having 11 angles and 11 sides.

undecagon British

/ ʌnˈdɛkəˌɡɒn /

noun

a polygon having eleven sides

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of undecagon

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Fortuitously for Malay et al., the edges of the snub cube very nearly match up with the alternating ‘spokes’ that radiate from the centre of an undecagon to its edges.

From Nature

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023