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orthopyroxene

/ ˌɔːθəʊpaɪˈrɒksiːn /

noun

  1. a member of the pyroxene group of minerals having an orthorhombic crystal structure, such as enstatite and hypersthene
“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


orthopyroxene

/ ôr′thə-pī-rŏksēn′ /

  1. 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.


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