TRAPEZOHEDRON

trapezohedron

(noun) a polyhedron whose faces are trapeziums

Source: WordNet® 3.1

Etymology

Noun

trapezohedron (plural trapezohedra or trapezohedrons)

(geometry, crystallography) Any of a class of polyhedra that have kite-shaped faces and are dual polyhedra of antiprisms.

(crystallography) A deltoidal icositetrahedron.

Usage notes

In crystallography, trapezohedron usually refers to the second (deltoidal icositetrahedron) sense, although crystals exist in both shapes.

Synonyms

• (polyhedron whose faces are kites): antibipyramid, antidipyramid, deltohedron

• (deltoidal icositetrahedron): deltoidal icositetrahedron, strombic icositetrahedron, tetragonal icosikaitetrahedron, tetragonal trisoctahedron, trapezoidal icositetrahedron

Source: Wiktionary

Trap`e*zo*he"dron, n. Etym: [NL., from trapezium + Gr. (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: Webster’s Unabridged Dictionary 1913 Edition

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