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rhombohedron

[rom-buh-hee-druh n]
noun, plural rhom·bo·he·drons, rhom·bo·he·dra [rom-buh-hee-druh] /ˌrɒm bəˈhi drə/.
  1. a solid bounded by six rhombic planes.
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Origin of rhombohedron

1830–40; < Greek rhómbo(s) rhombus + -hedron
Related formsrhom·bo·he·dral, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for rhombohedral

rhombohedral

adjective
  1. of or relating to a rhombohedron
  2. crystallog another term for trigonal (def. 2)
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rhombohedron

noun
  1. a six-sided prism whose sides are parallelograms
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Word Origin

C19: from rhombus + -hedron
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

rhombohedral in Science

rhombohedral

[rŏm′bō-hēdrəl]
  1. See trigonal.
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rhombohedron

[rŏm′bō-hēdrən]
Plural rhombohedrons rhombohedra
  1. A prism with six faces, each a rhombus.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.