n :  a colloidal proteinaceous poisonous substance that is a specific product of the metabolic activities of a living organism and is usu. very unstable, notably toxic when introduced into the tissues, and typically capable of inducing antibody formation - see ANTITOXIN ENDOTOXIN EXOTOXIN  .
 
 
 
Similar sounding terms:  di·ox·ane  di·ox·in  tax·on 
 
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