psoriasis

Etymology

From Late Latin psōriasis (“mange, scurvy, psoriasis”), from Koine Greek ψωρίασις (psōríasis), from Ancient Greek ψώρα (psṓra, “itch”) + -σις (-sis, “-sis: forming nouns of action & medical disorders”). Cognate with psora.

noun

1. (pathology) A noncontagious disease whose main symptom is gray or silvery flaky patches on the skin which are red and inflamed underneath when scratched.
   He suffers from a skin complaint, psoriasis, which has rendered his hands scaly, hard and red. 2016, Ian McEwan, Nutshell, Vintage, page 11