Source : Webster's Revised Unabridged Dictionary (1913)

Conspecific \Con`spe*cif"ic\ (k[o^]n`sp[-e]*s[i^]f"[i^]k), a.
   Of the same species.

Source : WordNet®

conspecific
     adj : belonging to the same species; "cultivated cabbage and wild
           cabbage are conspecific"
     n : an organism belonging to the same species as another
         organism