Source : Webster's Revised Unabridged Dictionary (1913)

Distributively \Dis*trib"u*tive*ly\, adv.
   By distribution; singly; not collectively; in a distributive
   manner.

Source : WordNet®

distributively
     adv 1: as individuals or as separate units (not collectively);
            "taken distributively, their rights are imperceptible"
     2: in a distributive manner; "marine vertebrates have their
        weight supported distributively by the water"