pyroxene

1. n. A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90¡, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc. Source: opted

2. n. any of a group of crystalline silicate mineral common in igneous and metamorphic rocks Source: wordnet

3. A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 90º, and also in massive forms which are often laminated. It varies in color from white to dark green and black, and includes many varieties differing in color and composition, as diopside, malacolite, salite, coccolite, augite, etc. They are all silicates of lime and magnesia with sometimes alumina and iron. Pyroxene is an essential constituent of many rocks, especially basic igneous rocks, as basalt, gabbro, etc. Note: The pyroxene group contains pyroxene proper, also the related orthorhombic species, enstatite, bronzite, hypersthene, and various monoclinic and triclinic species, as rhodonite, etc. Source: webster

4. A common mineral occurring in monoclinic crystals, with aprismatic angle of nearly 90º, and also in massive forms which areoften laminated. It varies in color from white to dark green andblack, and includes many varieties differing in color andcomposition, as diopside, malacolite, salite, coccolite, augite, etc.They are all silicates of lime and magnesia with sometimes aluminaand iron. Pyroxene is an essential constituent of many rocks,especially basic igneous rocks, as basalt, gabbro, etc. Source: adambom

5. n any of a group of crystalline silicate mineral common in igneous and metamorphic rocks Source: ecdict

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