TRIHEDRAL

Etymology

Adjective

trihedral (not comparable)

(geometry) Having three plane faces that meet at a common point

Source: Wiktionary

Tri*he"dral, a. Etym: [See Trihedron.] (Geom.)

Definition: Having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. [Written also triedral.]

Source: Webster’s Unabridged Dictionary 1913 Edition

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