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



BrE BrE//ˌpɒliˈhiːdrən//
; NAmE NAmE//ˌpɑːliˈhiːdrən//
; BrE BrE//ˌpɒliˈhedrən//
; NAmE NAmE//ˌpɑːliˈhedrən//
(pl. polyhedra
BrE BrE//ˌpɒliˈhiːdrə//
; NAmE NAmE//ˌpɑːliˈhiːdrə//
; BrE BrE//ˌpɒliˈhed//
; NAmE NAmE//ˌpɑːliˈhed//
, polyhedrons)
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a solid shape with many flat sides, usually more than six Word Originlate 16th cent.: from Greek poluedron, neuter (used as a noun) of poluedros ‘many-sided’.
See the Oxford Advanced American Dictionary entry: polyhedron