Source : Webster's Revised Unabridged Dictionary (1913)

Vaccinate \Vac"ci*nate\, v. t. [imp. & p. p. {Vaccinated}; p.
   pr. & vb. n. {Vaccinating}.] [See {Vaccine}.]
   To inoculate with the cowpox by means of a virus, called
   vaccine, taken either directly or indirectly from cows.

Source : WordNet®

vaccinate
     v : perform vaccinations or produce immunity in by inoculation;
         "We vaccinate against scarlet fever"; "The nurse
         vaccinated the children in the school" [syn: {immunize},
         {immunise}, {inoculate}]