Definition of hexahedron noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ˌheksəˈhiːdrən//
; NAmE NAmE//ˌheksəˈhiːdrən//
; BrE BrE//ˌheksəˈhedrən//
; NAmE NAmE//ˌheksəˈhedrən//
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a solid shape with six flat sides Word Origin late 16th cent.: from Greek hexaedron, neuter (used as a noun) of hexaedros ‘six-faced’.
See the Oxford Advanced American Dictionary entry: hexahedron