trapezohedron

tra·pe·zo·he·dron

[truh-pee-zuh-hee-druhn, trap-uh-]
noun, plural tra·pe·zo·he·drons, tra·pe·zo·he·dra [-druh] .
1.
Crystallography. a crystal form having all faces trapeziums.
2.
Geometry. a trapezoid trisoctahedron.

Origin:
1810–20; trapez(oid) + -o + -hedron

tra·pe·zo·he·dral, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
trapezohedron (trəˌpiːzəʊˈhiːdrən) [Click for IPA pronunciation guide]
 
n , pl -drons, -dra
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]
 
trapezo'hedral
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Trapezohedron is always a great word to know.
So is quincunx. Does it mean:
the offspring of a zebra and a donkey.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.
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