Source : Webster's Revised Unabridged Dictionary (1913)

Disputative \Dis*put"a*tive\, a. [L. disputativus.]
   Disposed to dispute; inclined to cavil or to reason in
   opposition; as, a disputative temper. --I. Watts.

Source : WordNet®

disputative
     adj : inclined or showing an inclination to dispute or disagree,
           even to engage in law suits; "a style described as
           abrasive and contentious"; "a disputatious lawyer"; "a
           litigious and acrimonious spirit" [syn: {contentious},
           {disputatious}, {litigious}]