*brocard*

n. [ Perh. fr. Brocardica, Brocardicorum opus, a collection of ecclesiastical canons by Burkhard, Bishop of Worms, called, by the Italians and French, Brocard. ] An elementary principle or maximum; a short, proverbial rule, in law, ethics, or metaphysics. [ 1913 Webster ]

The legal brocard, “Falsus in uno, falsus in omnibus, ” is a rule not more applicable to other witness than to consciousness. Sir W. Hamilton. [ 1913 Webster ]