discussive /(?)/

dis·cuss·ive

discussive

a.
  1. Able or tending to discuss or disperse tumors or coagulated matter; discutient. (Med.)
  2. Doubt-dispelling; decisive. [R.]
    A kind of peremptory and discussive voice.
    — Hopkins.

Discussive

n.
  1. A medicine that discusses or disperses morbid humors; a discutient. (Med.)