/ Dictionary / Index M molybdenite: Meaning and Definition of Find definitions for: mo•lyb•de•nite Pronunciation: (mu-lib'du-nīt"), [key] — n. a soft, graphitelike mineral, molybdenum sulfide, MoS, occurring in foliated masses or scales: the principal ore of molybdenum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: molybdenite (Thesaurus) molybdate orange molybdenosis Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language