Breadcrumb Home > Dictionary > Index X xanth-: Meaning and Definition of Find definitions for: xanth- Pronunciation: [key] var. ofbefore a vowel: xanthoma. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Xanax xanthan ✖ Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language