NONAGON


Meaning of NONAGON in English

/ ˈnɒnəgən; NAmE ˈnɑːnəgɑːn/ noun

( geometry ) a flat shape with nine straight sides and nine angles

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WORD ORIGIN

mid 17th cent.: formed irregularly from Latin nonus ninth, on the pattern of words such as hexagon .

Oxford Advanced Learner's English Dictionary.      Оксфордский английский словарь для изучающик язык на продвинутом уровне.