/ Dictionary / Index P psoriasis: Meaning and Definition of Find definitions for: pso•ri•a•sis Pronunciation: (su-rī'u-sis), [key] — n. Pathol. a common chronic, inflammatory skin disease characterized by scaly patches. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: psoriasis (Thesaurus) psoralen psorosis Related Content Daily Word Quiz: designate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language