trapezohedron

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tra·pe·zo·he·dron

 (trə-pē′zō-hē′drən, trăp′ĭ-zō-)
n. pl. tra·pe·zo·he·drons or tra·pe·zo·he·dra (-drə)
Any of several forms of crystal with trapeziums as faces.

trapezohedron

(trəˌpiːzəʊˈhiːdrən)
n, pl -drons or -dra (-drə)
(Chemistry) crystallog a crystal form in which all the crystal's faces are trapeziums
[C19: from trapezo- combining form of trapezium + -hedron, on the model of tetrahedron]
traˌpezoˈhedral adj

tra•pe•zo•he•dron

(trəˌpi zəˈhi drən, ˌtræp ə-)

n., pl. -drons, -dra (-drə)
a crystal form having all faces trapeziums.
[1810–20]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.trapezohedron - a polyhedron whose faces are trapeziumstrapezohedron - a polyhedron whose faces are trapeziums
polyhedron - a solid figure bounded by plane polygons or faces
References in periodicals archive ?
Several shelves of a big glass wall case facing the front door were decked out in green and orange--superlative demantoid specimens alternating with big, gemmy trapezohedrons of Tanzanian spessartine.
8 cm are found as isolated, opaque white trapezohedrons inside breccia cavities.
The pale brown "pseudoleucite" trapezohedrons reach 5 cm, and are well exposed on their lumps of still paler brown matrix, the lumps reaching 10 cm.
Right or left trapezohedrons occur in pairs at every other prism edge and actually define a two-fold screw axis (follow the blue line in Figs.
Even more beautiful were some miniature specimens of almandine-spessartine on schorl, both species performing brilliantly: the garnets are flashing, deep red, part-gemmy trapezohedrons to 2.