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orthopyroxene
or·tho·py·rox·ene [ àwrthō pī rók sn ]


noun 
Definition:
 
silicate mineral: a member of a subgroup of the pyroxene silicate minerals. Enstatite is an example.
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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