The Collaborative International Dictionary
Trihedral
Trihedral \Tri*he"dral\, a. [See Trihedron.] (Geom.) Having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. [Written also triedral.]
Wiktionary
trihedral
a. (context geometry English) Having three plane faces that meet at a common point
Usage examples of "trihedral".
It was an older model, a T-23 skyhopper, with con trols similar to the X-wing fighter, but with trihedral wings, and a passenger seat and cramped cargo compartment at the rear of the cockpit.
The four rockets, with stellar fuel RE-202-esane formed the points of a trihedral pyramid, within which hung the Snow Planet.