pyroxene

English Thesaurus

1. any of a group of crystalline silicate mineral common in igneous and metamorphic rocks (noun.substance)

hypernym	:	mineral,
definition	:	solid homogeneous inorganic substances occurring in nature having a definite chemical composition (noun.substance)

substance meronym	:	nephelinite,
definition	:	an igneous rock consisting of nepheline and pyroxene (noun.substance)

substance meronym	:	basalt,
definition	:	the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene (noun.substance)