bacterial toxin - any endotoxin or exotoxin formed in or elaborated by bacterial cellstoxin - a poisonous substance produced during the metabolism and growth of certain microorganisms and some higher plant and animal species anatoxin, toxoid - a bacterial toxin that has been weakened until it is no longer toxic but is strong enough to induce the formation of antibodies and immunity to the specific disease caused by the toxin; "diphtheria toxoid" |