American English

Definition of decagon noun from the Oxford Advanced American Dictionary

 

decagon

 noun
noun
NAmE//ˈdɛkəˌɡɑn//
 
(geometry)
 
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a flat shape with ten straight sides and ten angles
NAmE//dəˈkæɡənl//
 
adjective
See the Oxford Advanced Learner's Dictionary entry: decagon