psy·chi·a·try 
(sĭ-kīə-trē, sī-)
(sĭ-kīə-trē, sī-)n.
The branch of medicine that deals with the diagnosis, treatment, and prevention of mental and emotional disorders.
psy′chi·atric (sī′kē-ătrĭk), psy′chi·atri·cal (-rĭ-kəl) adj.
psy′chi·atri·cal·ly adv.