toxin-antitoxin

US: (tok′sin an′ti tok′sin, -an′tē-, -an′ti tok′sin, -an′tē-)

WordReference Random House Unabridged Dictionary of American English © 2025

tox•in-an•ti•tox•in  (tok′sin an′ti tok′sin, -an′tē-, -an′ti tok′sin, -an′tē-), n. [Immunol.]

1. a mixture of toxin and antitoxin, formerly used to induce active immunity against certain diseases, esp. diphtheria.

• 1900–05

Collins Concise English Dictionary © HarperCollins Publishers::

toxin-antitoxin noun

1. a mixture of a specific toxin and antitoxin. The diphtheria toxin-antitoxin was formerly used in the US for active immunization