carcĕrārĭus, a, um, adj. [carcer],
of or belonging to a prison : quaestus, of keeping a prison , Plaut. Capt. 1, 2, 20.—Hence, subst.: carcĕrārĭus , ii, m., a prisonkeeper , jailer , Inscr. Grut. 80, 5; Don. ad Ter. Phorm. 373; cf. carcer, I. C. b.