tri·he·dral (tr -h  dr l)adj. Having or formed by three planes meeting at a point. n. See trihedron. |
trihedral [traɪˈhiːdrəl]
adj
(Mathematics) having or formed by three plane faces meeting at a point
n
(Mathematics) a figure formed by the intersection of three lines in different planes
[from tri- + Greek hedra base, seat + -al1]
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