The Collaborative International Dictionary of English v.0.48:

Neurology \Neu*rol"o*gy\, n. [Neuro- + -logy.]
   The branch of science which treats of the nervous system.
   [1913 Webster]

WordNet (r) 3.0 (2006):

neurology
    n 1: the branch of medical science that deals with the nervous
         system
    2: (neurology) the branch of medicine that deals with the
       nervous system and its disorders [syn: neurology, clinical
       neurology]