TRAPEZOHEDRON

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.