/ Dictionary / Index X xantho-: Meaning and Definition of Find definitions for: xantho- Pronunciation: [key] a combining form meaning “yellow,” used in the formation of compound words: xanthophyll. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Xanthippe xanthoma Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language