- a circulating antibody formed by the body, as active immunity, to act against a specific toxin
- a sterile solution containing an antitoxin: it is taken from the blood serum of an immunized animal or person and injected into a person to prevent a specific disease, as tetanus or diphtheria, by creating a passive immunity
- An antibody formed in response to and capable of neutralizing a specific toxin of biological origin.
- An animal or human serum containing antitoxins. It is used in medicine to prevent or treat diseases caused by the action of biological toxins, such as tetanus, botulism, and diphtheria.
- An antibody that is capable of neutralising specific toxins that are causative agents of disease.