/ Dictionary / Index T tantalite: Meaning and Definition of Find definitions for: tan•ta•lite Pronunciation: (tan'tl-īt"), [key] — n. a black, crystalline mineral, iron tantalate, (Fe, Mn) TaO, the principal ore of tantalum and an end member of a series of solid solutions in which manganese and niobium combine to form columbite. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: tantalite (Thesaurus) tantalic acid tantalize Related Content Daily Word Quiz: profiterole Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language