The Collaborative International Dictionary of English v.0.48:

Dentist \Den"tist\, n. [From L. dens, dentis, tooth: cf. F.
   dentiste. See Tooth.]
   One whose business it is to clean, extract, or repair natural
   teeth, and to make and insert artificial ones; a dental
   surgeon. Dentistic

WordNet (r) 3.0 (2006):

dentist
    n 1: a person qualified to practice dentistry [syn: dentist,
         tooth doctor, dental practitioner]

The Devil's Dictionary (1881-1906):

DENTIST, n.  A prestidigitator who, putting metal into your mouth,
pulls coins out of your pocket.