Definition of decagon
English to English noun - a polygon with 10 sides and 10 angles
source: WordNet 3.0 - 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 1913
Visual Synonyms 
Nearby Word
decagon, dodecagon, dagon, decane, decani, deacon, decagynia, decagynian, decuman, diecian, dodecagynia, dagan, decoyman, dodecane, deign, dioecian, dietician, dodecagynian, decession, desman
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