/ Dictionary / Index S self-antigen: Meaning and Definition of Find definitions for: self-an•ti•gen Pronunciation: (self'an'ti-jun, -jen"), [key] — n. Immunol. autoantigen. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. self-annihilation self-appointed Related Content Daily Word Quiz: topography Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language