Real Dictionary

fungible in American English
a fungible thing
designating movable goods, as grain, any unit or part of which can replace another unit, as in discharging a debt
adjective: being of such nature or kind as to be freely exchangeable or replaceable, in whole or in part, for another of like nature or kind

fungible in British English
adjective: having the nature or quality of fungibles
noun: moveable perishable goods of a sort that may be estimated by number or weight, such as grain, wine, etc