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  1  definition  found 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
  Antitoxin  \An`ti*tox"in\,  Antitoxine  \An`ti*tox"ine\,  n.  [Pref. 
  anti-  +  toxin.] 
  A  substance  (sometimes  the  product  of  a  specific 
  micro-organism  and  sometimes  naturally  present  in  the  blood 
  or  tissues  of  an  animal),  capable  of  producing  immunity  from 
  certain  diseases,  or  of  counteracting  the  poisonous  effects 
  of  pathogenic  bacteria.