n 1  :  the act or process or an instance of inoculating: as  a  :  the introduction of a microorganism into a medium suitable for its growth  b (1) :  the introduction of a pathogen or antigen into a living organism to stimulate the production of antibodies (2) :  the introduction of a vaccine or serum into a living organism to confer immunity <travelers in the tropics should have typhoid s>   2  :  INOCULUM .
 
 
 
Similar sounding terms:  in·clu·sion 
 
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