xanthoma noun. [zan'Ɵǝʊmǝ] Pl. -mas, -mata [-mǝtǝ]. M19.
[from XANTHO- + -OMA.]
Medicine. A condition characterized by the formation of yellowish patches or nodules on the skin due to deposition of lipids. Now usu., such a patch or nodule.

■ xanthoma'tosis noun, pl. -toses [-'tǝʊsi:z], a metabolic disorder marked by the accumulation of lipids in the blood and the presence of multiple and widespread xanthomas E20.

■ xanthomatous adjective pertaining to or of the nature of xanthoma E20.

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