/ Dictionary / Index E ellagic acid: Meaning and Definition of Find definitions for: el•lag'ic ac'id Pronunciation: (u-laj'ik), [key] — Pharm. Pharm. a yellow crystalline substance, CHO, isolated from oak galls and tannins and used as a hemostatic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Ella Ellas Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language