n. A noncontagious disease whose main symptom is gray or silvery flaky patches on the skin which are red and inflamed underneath when scratched.
the GNU version of the Collaborative International Dictionary of English
n. The state of being affected with psora.
n. A cutaneous disease, characterized by imbricated silvery scales, affecting only the superficial layers of the skin.
The Century Dictionary and Cyclopedia
n. A chronic non-contagious skin-disease, characterized by reddish, slightly elevated, dry patches of varying size, shape, and number, covered with whitish or grayish imbricated scales.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. 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
Word Usage
"For decades after Willan's description, some authors favored using the term psoriasis, while others chose the term lepra."