pyroxene, n. [F. pyroxène, from Gr. fire + a stranger; -- so called because it was supposed to the be a stranger, or of rare occurrence, in igneous rocks,].
A common mineral occurring in monoclinic crystals, with a prismatic angle of nearly 901913 Webster]
" The pyroxene group contains pyroxene proper, also the related orthorhombic species, enstatite, bronzite, hypersthene, and various monoclinic and triclinic species, as rhodonite, etc."
[1913 Webster]