The Collaborative International Dictionary
Pityriasis versicolor
Pityriasis \Pit`y*ri"a*sis\, n. [NL., fr. Gr. ?, fr. ?, lit., bran.]
(Med.) A superficial affection of the skin, characterized by irregular patches of thin scales which are shed in branlike particles.
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(Veter.) A disease of domestic animals characterized by dry epithelial scales, and due to digestive disturbances and alteration of the function of the sebaceous glands.
Pityriasis versicolor [NL.] (Med.), a parasitic disease of the skin, characterized by the development of reddish or brownish patches.