/ Dictionary / Index T tantalous: Meaning and Definition of Find definitions for: tan•ta•lous Pronunciation: (tan'tl-us), [key] — adj. Chem. containing trivalent tantalum. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tantalizing tantalum Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language