/ Dictionary / Index T tannic acid: Meaning and Definition of Find definitions for: tan'nic ac'id Pronunciation: [key] — Chem. Chem. See under Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. tannic tannin Related Content Daily Word Quiz: agitated Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language