Enneagon
Enneagon (?; 277) , noun
[Greek 'enne`a nine + gwni`a corner, angle: compare ennéagone.]
(Geometry) A polygon or plane figure with nine sides and nine angles; a nonagon.
Enneagon (?; 277) , noun
[Greek 'enne`a nine + gwni`a corner, angle: compare ennéagone.]