Source : Webster's Revised Unabridged Dictionary (1913)

Expiscate \Ex*pis"cate\, v. t. [L. expiscatus, p. p. of
   expiscari to fish out; ex out+piscari to fish, piscis fish.]
   To fish out; to find out by skill or laborious investigation;
   to search out. ``To expiscate principles.'' [R.] --Nichol.

         Dr.Burton has with much ingenuity endeavord to
         expiscate the truth which may be involved in them. --W.
                                                  L. Alexander.