Source : Webster's Revised Unabridged Dictionary (1913)

Reductive \Re*duc"tive\ (-t?v), a. [Cf. F. r['e]ductif.]
   Tending to reduce; having the power or effect of reducing. --
   n. A reductive agent. --Sir M. Hale.

Source : WordNet®

reductive
     adj : characterized by or causing diminution or curtailment;
           "their views of life were reductive and depreciabory" -
           R.H.Rovere