Source : Webster's Revised Unabridged Dictionary (1913)

Inoculator \In*oc"u*la`tor\, n. [L.: cf. F. inoculateur.]
   One who inoculates; one who propagates plants or diseases by
   inoculation.

Source : WordNet®

inoculator
     n : a medical practitioner who inoculates people against
         diseases [syn: {vaccinator}]