The Collaborative International Dictionary of English v.0.48:

Conative \Co"na*tive\ (? or ?), a. [See Conatus.]
   Of or pertaining to conation.
   [1913 Webster]

         This division of mind into the three great classes of
         the cognitive faculties, the feelings, . . . and the
         exertive or conative powers, . . . was first
         promulgated by Kant.                     --Sir W.
                                                  Hamilton.
   [1913 Webster]