Source : Webster's Revised Unabridged Dictionary (1913)

Perceptive \Per*cep"tive\, a. [Cf. F. perceptif.]
   Of or pertaining to the act or power of perceiving; having
   the faculty or power of perceiving; used in perception. ``His
   perceptive and reflective faculties.'' --Motley.

Source : WordNet®

perceptive
     adj 1: of or relating to perception; "perceptive faculties"
     2: having the ability to perceive or understand; keen in
        discernment; "a perceptive eye"; "a perceptive
        observation" [ant: {unperceptive}]