HEPTAHEDRON


Meaning of HEPTAHEDRON in English

/ ˌheptəˈhiːdrən; NAmE ; -ˈhed-/ noun

( geometry ) a solid figure with seven flat sides

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WORD ORIGIN

late 17th cent.: from hepta- seven + -hedron , on the pattern of words such as polyhedron .

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