Source : Webster's Revised Unabridged Dictionary (1913)

Psychiatria \Psy*chi`a*tri"a\, Psychiatry \Psy*chi"a*try\, n.
   [NL. psychiatria, fr. Gr. ? the mind + ? healing.] (Med.)
   The application of the healing art to mental diseases.
   --Dunglison.

Source : WordNet®

psychiatry
     n : the branch of medicine dealing with the diagnosis and
         treatment of mental disorders [syn: {psychopathology}, {psychological
         medicine}]