The Collaborative International Dictionary of English v.0.48:

coordinative \coordinative\ adj. (Grammar)
   same as coordinating. subordinative

   Syn: co-ordinating, coordinating.
        [WordNet 1.5]

The Collaborative International Dictionary of English v.0.48:

Coordinative \Co*["o]r"di*na*tive\, a. (Gram.)
   Expressing coordination. --J. W. Gibbs.
   [1913 Webster]

WordNet (r) 3.0 (2006):

coordinative
    adj 1: serving to connect two grammatical constituents of
           identical construction; "`and' in `John and Mary' or in
           `John walked and Mary rode' is a coordinating
           conjunction; and so is `or' in `will you go or stay?'"
           [syn: coordinating(a), coordinative] [ant:
           subordinating(a), subordinative]