Source : Webster's Revised Unabridged Dictionary (1913)

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.

Source : WordNet®

trapezohedron
     n : a polyhedron whose faces are trapeziums
     [also: {trapezohedra} (pl)]