Trapezohedron definitions

Trapezohedron

1) Polyhedron
Found on https://www.crosswordclues.com/clue/trapezohedron

The n-gonal trapezohedron, antidipyramid or deltohedron is the dual polyhedron of an n-gonal antiprism. Its 2n faces are congruent kites (also called trapezia or deltoids). The faces are symmetrically staggered. The n-gon part of the name does not reference the faces here but arrangement of vertices around an axis of symmetry. The dual n-gonal ant...
Found on http://en.wikipedia.org/wiki/Trapezohedron

Trapezohedron

• (n.) A tetartohedral solid of the hexagonal system, bounded by six trapezoidal planes. The faces of this form are common on quartz crystals. • (n.) A solid bounded by twenty-four equal and similar trapeziums; a tetragonal trisoctahedron. See the Note under Trisoctahedron.
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trapezohedron

(from the article `garnet`) Garnets commonly occur as well-developed crystals. The typical forms of the crystals have 12 or 24 sides and are called dodecahedrons (see ...
Found on http://www.britannica.com/eb/a-z/t/73

trapezohedron

<chemistry> A solid bounded by twenty-four equal and similar trapeziums; a tetragonal trisoctahedron. See the Note under Trisoctahedron. ... A tetartohedral solid of the hexagonal system, bounded by six trapezoidal planes. The faces of this form are common on quartz crystals. ... Origin: NL, from trapezium + Gr. Seat, base, fr. To sit. ... So...
Found on http://www.encyclo.co.uk/local/20973