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orthopyroxene

/ (ˌɔːθəʊpaɪˈrɒksiːn) /
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noun
a member of the pyroxene group of minerals having an orthorhombic crystal structure, such as enstatite and hypersthene
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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

Scientific definitions for orthopyroxene

orthopyroxene
[ ôr′thə-pī-rŏksēn′ ]

Any variety of the mineral pyroxene that crystallizes in the orthorhombic system and contains no calcium and little or no aluminum. Enstatite is an orthopyroxene.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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