oppositive

from WordNet (r) 3.0 (2006)

oppositive
    adj 1: expressing antithesis or opposition; "the adversative
           conjunction `but' in `poor but happy'" [syn:
           {adversative}, {oppositive}]

from The Collaborative International Dictionary of English v.0.48

Oppositive \Op*pos`i*tive\, a. [Cf. F. oppositif. See
   {Opposite}.]
   Capable of being put in opposition. --Bp. Hall.
   [1913 Webster]

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