/ Dictionary / Index X xylem ray: Meaning and Definition of Find definitions for: xy'lem ray" Pronunciation: [key] a vascular ray extending into or located entirely within the secondary xylem. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xylem xylene Related Content Daily Word Quiz: diligent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language