D defs.my
Entry 2 senses Webster, 1913

Pityriasis

· Pit·y·ri·a·sis · IPA /ˌpɪtəˈɹaɪəsɪs/
01 n. A superficial affection of the skin, characterized by irregular patches of thin scales which are shed in branlike particles.
  1. 1.
    A superficial affection of the skin, characterized by irregular patches of thin scales which are shed in branlike particles.(Med.)
  2. 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.