Trap`e*zo*he"dron (?), n. [NL., from trapezium + Gr. seat, base, fr. to sit.] Crystalloq. (a)
A solid bounded by twenty-four equal and similar trapeziums; a tetragonal trisoctahedron. See the Note under Trisoctahedron.
(b)
A tetartohedral solid of the hexagonal system, bounded by six trapezoidal planes. The faces of this form are common on quartz crystals.
© Webster 1913.