The Collaborative International Dictionary of English v.0.48:

Odontology \O`don*tol"o*gy\, n. [Odonto- + -logy: cf. F.
   odontologie.]
   The science which treats of the teeth, their structure and
   development.
   [1913 Webster]

WordNet (r) 3.0 (2006):

odontology
    n 1: the branch of medicine dealing with the anatomy and
         development and diseases of the teeth [syn: dentistry,
         dental medicine, odontology]