Writ, to take caution or security. A writ which anciently lay against a bishop who held an excommunicated person in prison for his contempt, notwithstanding he had offered sufficient security (idoncam cuutioncm) to obey the commands of the church; commanding him to take such security and release the prisoner. Reg. Orig. 66; Fitzh. Nat.Brev. 63, C.