Source : Webster's Revised Unabridged Dictionary (1913)

Alienism \Al"ien*ism\, n.
   1. The status or legal condition of an alien; alienage.

            The law was very gentle in the construction of the
            disability of alienism.               --Kent.

   2. The study or treatment of diseases of the mind.

Source : WordNet®

alienism
     n : the quality of being alien [syn: {alienage}]