Psoriasis
Pronunciation : Pso*ri"a*sis
Part of Speech : n.
Etymology : [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