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noun Trapezohedron n. (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.
Collaborative International Dictionary of English 0.48
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