PSORIASIS
psoriasis
(noun) a chronic skin disease characterized by dry red patches covered with scales; occurs especially on the scalp and ears and genitalia and the skin over bony prominences
Source: WordNet® 3.1
Etymology
Noun
psoriasis (countable and uncountable, plural psoriases)
(disease) A noncontagious disease whose main symptom is gray or silvery flaky patches on the skin which are red and inflamed underneath when scratched.
Source: Wiktionary
Pso*ri"a*sis, n. Etym: [NL., fr. Gr. (Med.)
(a) The state of being affected with psora. [Obs.]
(b) A cutaneous disease, characterized by imbricated silvery scales,
affecting only the superficial layers of the skin.
Source: Webster’s Unabridged Dictionary 1913 Edition