[ uhn-dek-uh-gon, -guhn ]
/ ʌnˈdɛk əˌgɒn, -gən /
a polygon having 11 angles and 11 sides.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for undecagon
/ (ʌnˈdɛkəˌɡɒn) /
a polygon having eleven sides
Word Origin for undecagon
C18: from Latin undecim eleven (from unus one + decem ten) + -gon
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