[tok-sin-an-ti-tok-sin, -an-tee-, -an-ti-tok-sin, -an-tee-]
noun Immunology.
  1. a mixture of toxin and antitoxin, formerly used to induce active immunity against certain diseases, especially diphtheria.

Origin of toxin-antitoxin

First recorded in 1900–05 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for toxin-antitoxin


  1. a mixture of a specific toxin and antitoxin. The diphtheria toxin-antitoxin was formerly used in the US for active immunization
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

toxin-antitoxin in Medicine


  1. A mixture of a toxin and its antitoxin with a slight excess of toxin, formerly used as a vaccine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.