Obs. Also 5 bolyon. [a. F. bouillon, f. bouillir to BOIL.] a. A boiling, a quantity (of salt, etc.) boiled at one time (OF. boullon de sel, med.L. bullio mensura salinaria Du Cange); cf. mod. a boil of soap. b. A certain quantity of quicksilver; cf. un bouillon de vif argent xxv livres pesant (Carpentier s.v. Bullionum).
1453. Weighing Charges, in Heath, Grocers Comp. (1869), 422. Argent Vyff, ye bolyon iiijd.
1610. Holland, Camdens Brit., 575 (D.). In Wich the King and Earle have eight salt pits, which yeelded on the Friday sixteene Bullions.