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.
Pityriasis versicolor [NL.] (Med.), a parasitic disease of the skin, characterized by the development of reddish or brownish patches.
© Webster 1913
Pit`y*ri"a*sis (?), n. (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.
© Webster 1913