'Specialist' definitions:

Definition of 'specialist'

From: WordNet
noun
An expert who is devoted to one occupation or branch of learning [syn: specialist, specializer, specialiser] [ant: Renaissance man, generalist]
noun
Practices one branch of medicine [syn: specialist, medical specialist]

Definition of 'Specialist'

From: GCIDE
  • Specialist \Spe"cial*ist\, n. One who devotes himself to some specialty; as, a medical specialist, one who devotes himself to diseases of particular parts of the body, as the eye, the ear, the nerves, etc. [1913 Webster]