noun, plural xanthomas, xanthomata [zan-thoh-muh-tuh] . Pathology.
a yellow papule or nodule in the skin, containing lipid deposits.

1875–80; xanth- + -oma

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World English Dictionary
xanthoma (zænˈθəʊmə)
pathol the presence in the skin of fatty yellow or brownish plaques or nodules, esp on the eyelids, caused by a disorder of lipid metabolism

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Medical Dictionary

xanthoma xan·tho·ma (zān-thō'mə)
n. pl. xan·tho·mas or xan·tho·ma·ta (-mə-tə)
A yellowish-orange, lipid-filled nodule or plaque in the skin, often on an eyelid or over a joint.

The American Heritage® Stedman's Medical Dictionary
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