hendecagonPronunciation: /hɛnˈdɛkəg(ə)n/Definition of hendecagon noun a plane figure with eleven straight sides and angles. Derivatives hendecagonalPronunciation: /ˌhɛndɪˈkag(ə)n(ə)l/ adjective Origin: early 18th century: from hendeca- 'eleven' + -gon, on the pattern of words such as polygonhendecagon in other Oxford dictionaries Definition of hendecagon in the US English dictionary
