antigen antiganting • antigenic · · · Info · Definitions · Characters · · antigen · · Text Latin · · Script 7 · · Length 3 · · Syllables Definitions · · · (noun) any substance (as a toxin or enzyme) that stimulates an immune response in the body (especially the production of antibodies). · · Noun Definition 1 Characters · · a latin small letter a U+0061 e latin small letter e U+0065 g latin small letter g U+0067 i latin small letter i U+0069 n latin small letter n U+006E t latin small letter t U+0074