/ Dictionary / Index X xylan: Meaning and Definition of Find definitions for: xy•lan Pronunciation: (zī'lan), [key] — n. Chem. the pentosan occurring in woody tissue that hydrolyzes to xylose: used as a source of furfural. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. XXXX xylem Related Content Daily Word Quiz: pristine Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language