1 nonagon | Definition of nonagon

nonagon

noun
no·​na·​gon | \ ˈnō-nə-ˌgän How to pronounce nonagon (audio) \

Definition of nonagon

: a polygon of nine angles and nine sides

First Known Use of nonagon

circa 1639, in the meaning defined above

History and Etymology for nonagon

Latin nonus ninth + English -gon — more at noon

Keep scrolling for more

More from Merriam-Webster on nonagon

Rhyming Dictionary: Words that rhyme with nonagon