noun[with modifier] Medicine
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.
- Some of these disease processes are known by well-established names, such as pityriasis nigra, sporotrichosis, and chromoblastomycosis.
Late 17th century: modern Latin, from Greek pituriasis 'scurf', from pituron 'bran', + -asis.
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