decagon Meaning, Definition & Usage

  1. noun a polygon with 10 sides and 10 angles

WordNet

Dec"a*gon noun
Etymology
Pref. deca- + Gr. a corner or angle: cf. F. décagone.
Definitions
  1. (Geom.) 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.

Webster 1913