specialist

specialist
    n 1: an expert who is devoted to one occupation or branch of
         learning [syn: {specialist}, {specializer}, {specialiser}]
         [ant: {Renaissance man}, {generalist}]
    2: practices one branch of medicine [syn: {specialist}, {medical
       specialist}]
    

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]
    

76 Moby Thesaurus words for "specialist":
      Wall Streeter, adept, aficionado, amateur, anesthesiologist,
      artist, artiste, authoritative, authority, bond crowd, broker,
      buff, cardiologist, chiropodist, confined, connoisseur, critic,
      curb broker, dealer, dermatologist, dilettante, expert, eye doctor,
      eye-ear-nose-throat specialist, fan, feature, featured,
      floor broker, floor trader, floorman, freak, geriatrician,
      gerontologist, gynecologist, immunologist, internist, jobber,
      knowledgeable, limited, maestro, master, neurologist, nut,
      obstetrician, oculist, odd-lot dealer, ophthalmologist,
      orthopedist, otolaryngologist, otologist, pathologist,
      pediatrician, pediatrist, pit man, podiatrist, professional,
      psychiatrist, pundit, radiologist, registered representative,
      restricted, savant, scholar, serologist, sharebroker, skin man,
      specialistic, specialized, stock dealer, stock-exchange broker,
      stockbroker, stockjobber, technical, technical expert, technician,
      two-dollar broker