/ Dictionary / Index A autoantigen: Meaning and Definition of Find definitions for: au•to•an•ti•gen Pronunciation: (ô"tō-an'ti-jun, -jen"), [key] — n. Immunol. an antigen of one's own cells or cell products. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. autoantibody autobahn Related Content Daily Word Quiz: benevolent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language