/ Dictionary / Index X xylic acid: Meaning and Definition of Find definitions for: xy'lic ac'id Pronunciation: (zī'lik, zil'ik), [key] — Chem. Chem. any of six colorless, crystalline, isomeric acids having the formula CHO, derived from xylene. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xylene xylidine Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language