nonagon

noun

no·​na·​gon ˈnō-nə-ˌgän How to pronounce nonagon (audio)
: a polygon of nine angles and nine sides

Example Sentences

Recent Examples on the Web The cylindrical core is a dull metallic silver with several irregular nonagon fuel assemblies arranged in its center. Daniel Oberhaus, Wired, 15 May 2020

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'nonagon.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History

Etymology

Latin nonus ninth + English -gon — more at noon

First Known Use

circa 1639, in the meaning defined above

Time Traveler
The first known use of nonagon was circa 1639

Dictionary Entries Near nonagon

Cite this Entry

“Nonagon.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nonagon. Accessed 7 Feb. 2023.

Kids Definition

nonagon

noun
no·​na·​gon ˈnō-nə-ˌgän How to pronounce nonagon (audio)
: a polygon of nine angles and nine sides
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