ANTITOXIN
antitoxin
(noun) an antibody that can neutralize a specific toxin
Source: WordNet® 3.1
Etymology
Noun
antitoxin (plural antitoxins)
(immunology) An antibody that is capable of neutralising specific toxins that are causative agents of disease.
Source: Wiktionary
An`ti*tox"in, An`ti*tox"ine, n. Etym: [Pref. anti- + toxin.]
Definition: 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.
Source: Webster’s Unabridged Dictionary 1913 Edition