Source : Webster's Revised Unabridged Dictionary (1913)

Psychotherapeutics \Psy`cho*ther`a*peu"tics\, n. [Psycho- +
   therapeutics.] (Med.)
   The treatment of disease by acting on the mind, as by
   suggestion; mind cure; psychotherapy.

Source : WordNet®

psychotherapeutics
     n : the branch of psychiatry concerned with psychological
         methods [syn: {psychotherapy}, {mental hygiene}]