/ Dictionary / Index X xanthene: Meaning and Definition of Find definitions for: xan•thene Pronunciation: (zan'thēn), [key] — n. Chem. a yellow, crystalline substance, CHO, soluble in ether and slightly soluble in alcohol, used in organic synthesis and as a fungicide. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. xanthein xanthene dye 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