The Collaborative International Dictionary of English v.0.48:

Suspensive \Sus*pen"sive\, a. [Cf. F. suspensif. See Suspend.]
   Tending to suspend, or to keep in suspense; causing
   interruption or delay; uncertain; doubtful. "In suspensive
   thoughts." --Beaumont. "A suspensive veto." --Macaulay.
   [1913 Webster]

         The provisional and suspensive attitude. --J. Morley.
   [1913 Webster]

   Suspensive condition (Scots Law), a condition precedent, or
      a condition without the performance of which the contract
      can not be completed.
      [1913 Webster]

WordNet (r) 3.0 (2006):

suspensive
    adj 1: (of a situation) characterized by or causing suspense
           [syn: cliff-hanging, suspenseful, suspensive,
           nail-biting]
    2: undecided or characterized by indecisiveness