Pityriasis /(?)/

Pit·y·ri·a·sis

Pityriasis

n.
  1. A superficial affection of the skin, characterized by irregular patches of thin scales which are shed in branlike particles. (Med.)
  2. A disease of domestic animals characterized by dry epithelial scales, and due to digestive disturbances and alteration of the function of the sebaceous glands. (Veter.)

Phrases & Compounds
‖Pityriasis versicolor
[NL.] (Med.), a parasitic disease of the skin, characterized by the development of reddish or brownish patches.