The Collaborative International Dictionary of English v.0.48:

Dispositive \Dis*pos"i*tive\, a. [Cf. F. dispositif.]
   1. Disposing; tending to regulate; decretive. [Obs.]
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            His dispositive wisdom and power.     --Bates.
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   2. Belonging to disposition or natural, tendency. [Obs.]
      "Dispositive holiness." --Jer. Taylor.
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