Antitoxin \An`ti*tox"in\, Antitoxine \An`ti*tox"ine\, n. [Pref.
anti- + toxin.]
A substance (sometimes the product of a specific
micro-organism and sometimes naturally present in the blood
or tissues of an animal), capable of producing immunity from
certain diseases, or of counteracting the poisonous effects
of pathogenic bacteria.
[1913 Webster]