(1):

(a.) Having power to resolve; causing solution; solvent.

(2):

(n.) An equation upon whose solution the solution of a given pproblem depends.

(3):

(n.) That which has the power of resolving, or causing solution; a solvent.

(4):

(n.) That which has power to disperse inflammatory or other tumors; a discutient; anything which aids the absorption of effused products.