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



BrE BrE//traɪˈhɪdrən//
; NAmE NAmE//traɪˈhɪdrən//
; BrE BrE//traɪˈhedrən//
; NAmE NAmE//traɪˈhedrən//
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a solid shape with three sides in addition to its base or ends Word Originearly 19th cent.: from tri- ‘three’ + -hedron, on the pattern of words such as polyhedron.
See the Oxford Advanced American Dictionary entry: trihedron