/ Dictionary / Index A amphibolite: Meaning and Definition of Find definitions for: am•phib•o•lite Pronunciation: (am-fib'u-līt"), [key] — n. Petrog. a metamorphic rock composed mainly of amphibole and plagioclase. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: amphibolite (Thesaurus) amphibolic amphibology Related Content Daily Word Quiz: drowsy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language