What is Beneficium Cedendarum Actionum?

Legal Definition
In Roman law. The privilege by which a surety could, before paying the creditor, compel him to make over to him the actions which belonged to the stipulator, so as to avail himself of them. Sandars, Just. Inst. (5th Ed.) 332, 351.
-- Black's Law Dictionary
Legal Definition
A Roman law right of subrogation by the surety to the claims of the creditor against the principal.
-- Ballentine's Law Dictionary