The Collaborative International Dictionary of English v.0.48:

Attributive \At*trib"u*tive\, a. [Cf. F. attributif.]
   Attributing; pertaining to, expressing, or assigning an
   attribute; of the nature of an attribute.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Attributive \At*trib"u*tive\, n., (Gram.)
   A word that denotes an attribute; esp. a modifying word
   joined to a noun; an adjective or adjective phrase.
   [1913 Webster]

WordNet (r) 3.0 (2006):

attributive
    adj 1: of adjectives; placed before the nouns they modify;
           "`red' is an attributive adjective in `a red apple'"
           [syn: attributive, prenominal] [ant: predicative]