pyroxene

Noun
  1. Any of a group of crystalline silicate mineral common in igneous and metamorphic rocks (synset 114717557)
    is a type of: mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
    substance meronym:
    • nephelinite - an igneous rock consisting of nepheline and pyroxene
    • basalt - the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene

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