trihedral

trihedral

[trahy-hee-druhl]
adjective Geometry.
1.
having, or formed by, three planes meeting in a point: a trihedral angle.
noun
2.
a trihedron.

Origin:
1780–90; tri- + -hedral

subtrihedral, adjective
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World English Dictionary
trihedral (traɪˈhiːdrəl)
 
adj
1.  having or formed by three plane faces meeting at a point
 
n
2.  a figure formed by the intersection of three lines in different planes
 
[C18: from tri- + Greek hedra base, seat + -al1]

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