Source : Webster's Revised Unabridged Dictionary (1913)

Veterinarian \Vet`er*i*na"ri*an\, n. [L. veterinarius. See
   {Veterinary}.]
   One skilled in the diseases of cattle or domestic animals; a
   veterinary surgeon.

Source : WordNet®

veterinarian
     n : a doctor who practices veterinary medicine [syn: {veterinary},
          {veterinary surgeon}, {vet}]