Nonagon
Pronunciation : Non"a*gon
Part of Speech : n.
Etymology : [L. nonus ninth + Gr. (Math.)
Definition : Defn: A figure or polygon having nine sides and nine angles.
Source : Webster's Unabridged Dictionary, 1913
Merriam-Webster's Everyday Language Reference Set: Includes: The Merriam-Webster Dictionary, The Merriam-Webster Thesaurus, and The Merriam-Webster Vocabulary Builder