Source : Webster's Revised Unabridged Dictionary (1913)

Predicative \Pred"i*ca*tive\, a. [L. praedicativus.]
   Expressing affirmation or predication; affirming;
   predicating, as, a predicative term. -- {Pred"i*ca*tive*ly},
   adv.

Source : WordNet®

predicative
     adj : of adjectives; relating to or occurring within the predicate
           of a sentence; "`red' is a predicative adjective in
           `the apple is red'" [ant: {attributive}]