PITYRIASIS
pityriasis
(noun) any of several skin disorders characterized by shedding dry flakes of skin
Source: WordNet® 3.1
Etymology
Noun
pityriasis (plural pityriases)
(pathology) Any of several varieties of skin diseases characterized by the shedding of flakes or scales.
Source: Wiktionary
Pit`y*ri"a*sis, n. Etym: [NL., fr. Gr. (Med.)
Definition: A superficial affection of the skin, characterized by irregular
patches of thin scales which are shed in branlike particles.
Pityriasis versicolor Etym: [NL.] (Med.), a parasitic disease of the
skin, characterized by the development of reddish or brownish
patches.
Source: Webster’s Unabridged Dictionary 1913 Edition