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enneagon

American  
[en-ee-uh-gon, -guhn] / ˈɛn i əˌgɒn, -gən /

noun

  1. nonagon.

enneagon British  
/ ˈɛnɪəɡən /

noun

  1. another name for nonagon

"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 enneagon

1650–60; < Greek enneágōnos; ennea-, -gon

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.

And in geometry, an enneagon or nonagon is a nine-sided shape.

From BBC

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

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.