Hypertext Webster Gateway: "trapezohedron"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
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.
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Trisoctahedron \Tris*oc`ta*he"dron\, n. [Gr. ? thrice + FE.
octahedron.] (Crystallog.)
A solid of the isometric system bounded by twenty-four equal
faces, three corresponding to each face of an octahedron.
{Tetragonal trisoctahedron}, a trisoctahedron each face of
which is a quadrilateral; called also {trapezohedron} and
{icositetrahedron}.
{Trigonal trisoctahedron}, a trisoctahedron each face of
which is an isosceles triangle.
From WordNet (r) 1.7 (wn)
trapezohedron
n : a polyhedron whose faces are trapeziums
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