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Webster 1913 Edition
Trihedral
Tri-he′dral
,Adj.
[See
Trihedron
.] (Geom.)
Having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles.
[Written also
triedral
.] Webster 1828 Edition
Trihedral
TRIHE'DRAL
,Adj.