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.

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