Definition of pityriasis
: any of various skin conditions of humans or domestic animals marked by dry scaling patches of skin
Origin of pityriasis
New Latin, from Greek, from pityron scurf
First Known Use: circa 1693
Medical Definition of pityriasis
plural pityriases \-ˌsēz\play
1: any of several skin diseases marked by the formation and desquamation of fine scales
2: a disease of domestic animals marked by dry epithelial scales or scurf due to alteration of the function of the sebaceous glands and possibly associated with digestive disorders
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Medical Dictionary: Definition of "pityriasis"
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