Breadcrumb Home > Dictionary > Index X xanthoma: Meaning and Definition of Find definitions for: xan•tho•ma Pronunciation: (zan-thō'mu), [key] — pl. -mas, -ma•ta a yellow papule or nodule in the skin, containing lipid deposits. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: xanthoma (Thesaurus) xantho- xanthophyll ✖ Related Content Daily Word Quiz: tendentious Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language