Rom. Law. [a. L. fidepromissor, agent-n. f. fide-promittĕre, f. fides faith + promittĕre to promise.] One who promises or pledges himself as security for another; a bail, surety.
1875. Poste, Gaius, III. Comm. (ed. 2), 403. The sponsor and fidepromissor have vanished from the legislation of Justinian.
1880. Muirhead, Gaius, Digest 604. Fidepromissors could become accessory only to verbal obligations.
