exotoxin exotoxic • exotropia · · · Info · Definitions · Antonyms · Characters · · exotoxin · · Text Latin · · Script 8 · · Length 4 · · Syllables Definitions · · · (noun) a toxin that is secreted by microorganisms into the surrounding medium. · · Noun Definition 1 Antonyms · · · endotoxin · · Antonym 0 Characters · · e latin small letter e U+0065 i latin small letter i U+0069 n latin small letter n U+006E o latin small letter o U+006F t latin small letter t U+0074 x latin small letter x U+0078