Trapezohedron
Trapezohedron , noun
[New Latin, from trapezium + Greek {not transcribed} seat, base, from {not transcribed} to sit.]
(a)
(Crystalloq.) A solid bounded by twenty-four equal and similar trapeziums; a tetragonal trisoctahedron. See the Note under Trisoctahedron.
(b)
(Crystalloq.) A tetartohedral solid of the hexagonal system, bounded by six trapezoidal planes. The faces of this form are common on quartz crystals.