/ Dictionary / Index A antitoxin: Meaning and Definition of Find definitions for: an•ti•tox•in Pronunciation: (an"ti-tok'sin, an"tē-), [key] — n. a substance, formed in the body, that counteracts a specific toxin. the antibody formed in immunization with a given toxin, used in treating certain infectious diseases or in immunizing against them. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: antitoxin (Thesaurus) antitoxic antitrade Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language