Source : Webster's Revised Unabridged Dictionary (1913)

Discussive \Dis*cuss"ive\, n. (Med.)
   A medicine that discusses or disperses morbid humors; a
   discutient.

Discussive \Dis*cuss"ive\, a. [Cf. F. discussif.]
   1. (Med.) Able or tending to discuss or disperse tumors or
      coagulated matter.

   2. Doubt-dispelling; decisive. [R.]

            A kind of peremptory and discussive voice.
                                                  --Hopkins.