xanthoma
noun
xan·tho·ma
| \ zan-ˈthō-mə
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plural xanthomas
also xanthomata\ -mət-ə
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Medical Definition of xanthoma
: a fatty irregular yellow patch or nodule containing lipid-filled foam cells that occurs on the skin (as of the eyelids, neck, or back) or in internal tissue and is associated especially with disturbances of lipid metabolism