1. 
   Enneagon
   En'ne·a·gon noun [ Greek 'enne`a nine + gwni`a corner, angle: confer ennéagone .] (Geom.) A polygon or plane figure with nine sides and nine angles; a nonagon.
   Found op http://www.encyclo.co.uk/webster/E/44
   
   
2. 
   enneagon
   <geometry> A polygon or plane figure with nine sides and nine angles; a nonagon. ... Origin: Gr. Nine + corner, angle: cf. Enneagone. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?enneagon
   
   
3. 
   Enneagon
   • (n.) A polygon or plane figure with nine sides and nine angles; a nonagon.
   Found op http://thinkexist.com/dictionary/meaning/enneagon/
   
   
4. 
   enneagon
   nonagon, nonagonal; enneagon A polygon having nine angles and nine sides.
   Found op http://www.wordinfo.info/words/index/info/view_unit/1409/
   
   

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