The Collaborative International Dictionary of English v.0.48:

Sawbones \Saw"bones`\, n.
   A nickname for a surgeon.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sawbones
    n 1: a physician who specializes in surgery [syn: surgeon,
         operating surgeon, sawbones]

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "sawbones":
   Doctor of Medicine, GP, MD, Md, allopath, allopathist,
   attending physician, coroner, country doctor, croaker, doc, doctor,
   family doctor, general practitioner, house physician, intern,
   leech, medical, medical attendant, medical examiner, medical man,
   medical practitioner, medico, operative surgeon, operator,
   physician, physician in ordinary, resident, resident physician,
   surgeon