a. Numism. rare. [ad. med.Lat. foderāt-us, f. Rom. *fodero (It. fodero. OF. fuerre), a. Teut. *fôdr- sheath, case (see note s.v. FODDER). The etymologically equivalent F. fourré is used in the same sense.] Of a coin: Coated or sheathed.
1854. Badham, Halieut., 287, note. The pearly coating of these base metal beads is but the copy, by oysters, of a peculiar species of forgery practised formerly in the fabrication of foderate coins; these consist of an interior or anima of copper laminated on both sides with an apparently continuous coating of the purest silver; a device which no modern sagacity has been able to imitate or explain.