pityriasis

/ˈpɪdəˌraɪəsəs/

Definitions of pityriasis

1. noun

   any of several skin disorders characterized by shedding dry flakes of skin
   types:

   dandruff

   a condition in which white scales of dead skin are shed by the scalp

   pityriasis alba

   common form of pityriasis (usually in children or young adults) characterized by round patches of depigmentation

   pityriasis rosea

   pityriasis in which an itchy rash develops over the trunk and extremities

   type of:

   dermatosis

   disorder involving lesions or eruptions of the skin (in which there is usually no inflammation)