immunizing agent immunized • immunoassay · · · Info · Definitions · Synonyms · Characters · · immunizing agent · · Text Common · · Latin · · Scripts 16 · · Length 6 · · Syllables Definitions · · · (noun) any substance or organism that provokes an immune response (produces immunity) when introduced into the body. Synonyms: immunogen, immunizing agent. · · Noun Definition 1 Synonyms · · · immunogen · · Synonym 1 Characters · · space U+0020 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 m latin small letter m U+006D n latin small letter n U+006E t latin small letter t U+0074 u latin small letter u U+0075 z latin small letter z U+007A