Source : Webster's Revised Unabridged Dictionary (1913)

Causative \Caus"a*tive\, a. [L. causativus pertaining to a
   lawsuit (causa), but in the English sense from E. cause.]
   1. Effective, as a cause or agent; causing.

            Causative in nature of a number of effects. --Bacon.

   2. Expressing a cause or reason; causal; as, the ablative is
      a causative case.

Causative \Caus"a*tive\ (k[add]"z[.a]*t[i^]v), n.
   A word which expresses or suggests a cause.

Source : WordNet®

causative
     adj : producing an effect; "poverty as a causative factor in
           crime" [ant: {noncausative}]