(1):

(a.) Having power to dissolve power to dissolve a solid body; as, the dissolvent juices of the stomach.

(2):

(n.) A remedy supposed capable of dissolving concretions in the body, such as calculi, tubercles, etc.

(3):

(n.) That which has the power of dissolving or melting other substances, esp. by mixture with them; a menstruum; a solvent.