inoculator

from WordNet (r) 3.0 (2006)

inoculator
    n 1: a medical practitioner who inoculates people against
         diseases [syn: {inoculator}, {vaccinator}]

from The Collaborative International Dictionary of English v.0.48

Inoculator \In*oc"u*la`tor\, n. [L.: cf. F. inoculateur.]
   One who inoculates; one who propagates plants or diseases by
   inoculation.
   [1913 Webster]