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orthorhombic

[awr-thuh-rom-bik] /ˌɔr θəˈrɒm bɪk/
adjective, Crystallography
1.
noting or pertaining to a system of crystallization characterized by three unequal axes intersecting at right angles; rhombic; trimetric.
Compare crystal system.
Origin
1865-1870
1865-70; ortho- + rhombic
Related forms
pseudoorthorhombic, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for ortho-rhombic

orthorhombic

/ˌɔːθəʊˈrɒmbɪk/
adjective
1.
(crystallog) relating to the crystal system characterized by three mutually perpendicular unequal axes Also rhombic, trimetric
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
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ortho-rhombic in Science
orthorhombic
  (ôr'thō-rŏm'bĭk)   
Relating to a crystal having three axes of different lengths intersecting at right angles. The mineral topaz has orthorhombic crystals. See illustration at crystal.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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