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A parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
Answer for the clue "A parallelepiped bounded by six similar faces (either rhombuses or parallelograms) ", 12 letters:
rhombohedron
Word definitions for rhombohedron in dictionaries
Wiktionary
Word definitions in Wiktionary
n. A prism with six faces, each a rhombus.
WordNet
Word definitions in WordNet
n. a parallelepiped bounded by six similar faces (either rhombuses or parallelograms)
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Rhombohedron \Rhom`bo*he"dron\, n. [NL., fr. Gr. ??? rhomb + ??? seat, base.] (Geom. & Crystallog.) A solid contained by six rhomboids; a parallelopiped.
Wikipedia
Word definitions in Wikipedia
bgcolor=#e7dcc3 colspan=2|Rhombohedron align=center colspan=2| bgcolor=#e7dcc3|Type bgcolor=#e7dcc3|Faces bgcolor=#e7dcc3|Edges bgcolor=#e7dcc3|Vertices bgcolor=#e7dcc3| Symmetry group bgcolor=#e7dcc3|Properties In geometry , a rhombohedron is a three-dimensional ...
Usage examples of rhombohedron.
As in the other rhombohedral carbonates, the crystals possess perfect cleavages parallel to the faces of the rhombohedron.
Owing to the strong double refraction and the consequent wide separation of the two polarized rays of light traversing the crystal, an object viewed through a cleavage rhombohedron of Iceland-spar is seen double, hence the name doubly-refracting spar.
It was shaped like a rhombohedron, a slanted rectangle balanced on its narrow edge, and Janeway repressed a sudden grin.
One on her left was alive with drifting pyramids and rhombohedrons of oscillating, lambent energy, each a different color.
Each consisted of hexagonal rhombohedrons, the largest over three meters in length and almost half a meter in diameter.
But the surface of each of the larger jewels was fixed with a myriad of smaller rhombohedrons, and each of those with still smaller ones, in a kind of fractal dance.
One on her left was alive with drifting pyramids and rhombohedrons of oscillating, lambent energy, each a different color.