The Collaborative International Dictionary of English v.0.48:

Physician \Phy*si"cian\ (f[i^]*z[i^]sh"an), n. [OE. fisician,
   fisicien, OF. physucien, a physician, in F., a natural
   philosopher, an experimentalist in physics. See Physic.]
   1. A person skilled in medicine, or the art of healing;
      especially, one trained and licensed to treat illness and
      prescribe medicines; a doctor of medicine.
      [1913 Webster + PJC]

   2. Hence, figuratively, one who ministers to moral diseases;
      as, a physician of the soul.
      [1913 Webster]

WordNet (r) 3.0 (2006):

physician
    n 1: a licensed medical practitioner; "I felt so bad I went to
         see my doctor" [syn: doctor, doc, physician, MD,
         Dr., medico]

The Devil's Dictionary (1881-1906):

PHYSICIAN, n.  One upon whom we set our hopes when ill and our dogs
when well.