/ Dictionary / Index T toxin-antitoxin: Meaning and Definition of Find definitions for: tox•in-an•ti•tox•in Pronunciation: (tok'sin-an"ti-tok'sin, -an"tē-, -an'ti-tok"sin, -an'tē-), [key] — n. Immunol. a mixture of toxin and antitoxin, formerly used to induce active immunity against certain diseases, esp. diphtheria. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: toxin-antitoxin (Thesaurus) toxin toxiphobia Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language