pityriasis noun. [pɪtɪ'rʌɪǝsɪs] Pl. -ases [-ǝsi:z]. L17.
[mod. Latin from Greek pituriasis scurf, from pituron bran: see -IASIS.]
Medicine. Formerly, any of various skin conditions characterized by the development of fine flaky scales. Now only in mod. Latin phrs.
pityriasis capitis ['kapɪtɪs] [Latin = of the head] dandruff.

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