/ ˌpentəˈhiːdrən; NAmE ; -ˈhed-/ noun
( geometry ) a solid shape with five flat sides
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WORD ORIGIN
late 18th cent.: from penta- five + -hedron , on the pattern of words such as polyhedron .
/ ˌpentəˈhiːdrən; NAmE ; -ˈhed-/ noun
( geometry ) a solid shape with five flat sides
••
WORD ORIGIN
late 18th cent.: from penta- five + -hedron , on the pattern of words such as polyhedron .
Oxford Advanced Learner's English Dictionary. Оксфордский английский словарь для изучающик язык на продвинутом уровне. 2005