Breadcrumb Home > Dictionary > Index S sycosis: Meaning and Definition of Find definitions for: sy•co•sis Pronunciation: (sī-kō'sis), [key] — n. Pathol. an inflammatory disease of the hair follicles, characterized by a pustular eruption. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. sycophant Sydney ✖ Related Content Daily Word Quiz: acronym Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language