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Definition of Enneagon
1. n. A polygon or plane figure with nine sides and nine angles; a nonagon.
Definition of Enneagon
1. Noun. (geometry) A polygon with nine sides; a nonagon. ¹
¹ Source: wiktionary.com
Definition of Enneagon
1. a nonagon [n -S] - See also: nonagon
Medical Definition of Enneagon
1.