orthopyroxene [ˌɔːθəʊpaɪˈrɒksiːn]
n
(Earth Sciences / Minerals) a member of the pyroxene group of minerals having an orthorhombic crystal structure, such as enstatite and hypersthene
orthopyroxene (ôr th -p -r k s n) 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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