Definition of pityriasis in English:

pityriasis

noun

Medicine
  • [with modifier] A skin disease characterized by the shedding of fine flaky scales.

    • ‘Compared with pityriasis rosea, psoriatic lesions are thicker and scalier, and the lesions are not usually distributed along skin creases.’
    • ‘The rash of pityriasis rosea can look like eczema, ringworm, or psoriasis.’
    • ‘Tinea versicolor, also called pityriasis versicolor, is a common yeast infection of the skin.’
    • ‘The man with the new flaxen locks instead explained that he was struggling with pityriasis rosea, a chicken pox-like virus.’
    • ‘Some of these disease processes are known by well-established names, such as pityriasis nigra, sporotrichosis, and chromoblastomycosis.’

Origin

Late 17th century: modern Latin, from Greek pituriasis scurf from pituron bran + -asis.

Pronunciation:

pityriasis

/ˌpidəˈrīəsəs/