Decagon
Pronunciation : Dec"a*gon
Part of Speech : n.
Etymology : [Pref. deca- + Gr. d?cagone.] (Geom.)
Definition : Defn: A plane figure having ten sides and ten angles; any figure having ten angles. A regular decagon is one that has all its sides and angles equal.
Source : Webster's Unabridged Dictionary, 1913