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®

predicatively
     adv : occuring within the predicate phrase; "predicatively used
           adjectives"