Source : Webster's Revised Unabridged Dictionary (1913)

Therapeutic \Ther`a*peu"tic\, Therapeutical \Ther`a*peu"tic*al\,
   a. [F. th['e]rapeutique, Gr. ?, from ? attendant, servant, ?
   to serve, take care of, treat medically, ? attendant,
   servant.] (Med.)
   Of or pertaining to the healing art; concerned in discovering
   and applying remedies for diseases; curative. ``Therapeutic
   or curative physic.'' --Sir T. Browne.

         Medicine is justly distributed into ``prophylactic,''
         or the art of preserving health, and therapeutic, or
         the art of restoring it.                 --I. Watts.

Therapeutic \Ther`a*peu"tic\, n.
   One of the Therapeut[ae].

Source : WordNet®

therapeutic
     adj 1: tending to cure or restore to health; "curative powers of
            herbal remedies"; "her gentle healing hand"; "remedial
            surgery"; "a sanative environment of mountains and
            fresh air"; "a therapeutic agent"; "therapeutic diets"
            [syn: {curative}, {healing(p)}, {alterative}, {remedial},
             {sanative}]
     2: relating to or involved in therapy; "therapeutic approach to
        criminality" [syn: {therapeutical}]