/ Dictionary / Index P pyroxene: Meaning and Definition of Find definitions for: py•rox•ene Pronunciation: (pī-rok'sēn, pu-, pī'rok-sēn"), [key] — n. any of a very common group of minerals of many varieties, silicates of magnesium, iron, calcium, and other elements, occurring as important constituents of many kinds of rocks, esp. basic igneous rocks. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: pyroxene (Thesaurus) pyrotraumatic dermatitis pyroxenite Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language