contributive

from WordNet (r) 3.0 (2006)

contributive
    adj 1: tending to bring about; being partly responsible for;
           "working conditions are not conducive to productivity";
           "the seaport was a contributing factor in the growth of
           the city"; "a contributory factor" [syn: {conducive},
           {contributing(a)}, {contributive}, {contributory},
           {tributary}]

from The Collaborative International Dictionary of English v.0.48

Contributive \Con*trib"u*tive\, a.
   Contributing, or tending to contribute. --Fuller.
   [1913 Webster]