/ Dictionary / Index X xylitol: Meaning and Definition of Find definitions for: xy•li•tol Pronunciation: (zī'li-tôl", -tol"), [key] — n. Biochem. a naturally occurring pentose sugar alcohol, CHO, used as a sugar substitute. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xylidine xylo- Related Content Daily Word Quiz: rustic Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language