pityriasis(redirected from pityriasis nigra)
Also found in: Thesaurus, Medical, Encyclopedia.
Related to pityriasis nigra: pityriasis versicolor
n. pl. pit·y·ri·a·ses (-sēz′)
Any of various skin diseases of humans and animals, characterized by epidermal shedding of flaky scales.
1. (Pathology) any of a group of skin diseases characterized by the shedding of dry flakes of skin
2. (Veterinary Science) a similar skin disease of certain domestic animals
[C17: via New Latin from Greek pituriasis scurfiness, from pituron bran]
pit•y•ri•a•sis(ˌpɪt əˈraɪ ə sɪs)
any of several skin diseases marked by the shedding of branlike scales.
[1685–95; < New Latin < Greek pitȳríāsis branlike eruption =pítȳr(on) bran, scale + -iāsis -iasis]
Switch to new thesaurus
|Noun||1.||pityriasis - any of several skin disorders characterized by shedding dry flakes of skin|
dermatosis - disorder involving lesions or eruptions of the skin (in which there is usually no inflammation)
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