/ Dictionary / Index M magnetite: Meaning and Definition of Find definitions for: mag•net•ite Pronunciation: (mag'ni-tīt"), [key] — n. a very common black iron oxide mineral, FeO, that is strongly attracted by magnets: an important iron ore. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: magnetite (Thesaurus) magnetism magnetizable Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language