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]WordNet (r) 3.0 (2006):
inoculator n 1: a medical practitioner who inoculates people against diseases [syn: inoculator, vaccinator]