The Collaborative International Dictionary of English v.0.48:

Specificate \Spe*cif"i*cate\ (sp[-e]*s[i^]f"[i^]*k[=a]t), v. t.
   [See Specify.]
   To show, mark, or designate the species, or the
   distinguishing particulars of; to specify. [Obs.] --ir M.
   Hale.
   [1913 Webster]