Trāp'e-zo-hē'dron, n.

n. [Fr. trapézoèdre, from Gr. τραπέζα, τραπέζιον, and ἕδρα, seat, base, from ἕζεσθαι, to sit. See supra.] (Geom.) A solid bounded by twenty-four equal and similar trapeziums;—a common crystalline form of garnet. Dana.