seigniorage
/ˈseɪnjərɪdʒ/(亦作seignorage)
noun
mass noun
1- profit made by a government by issuing currency, especially the difference between the face value of coins and their production costs（政府的）造币利润（尤指造币面值与其制造成本之间的利差）。
1.1
- historical the Crown's right to a percentage on bullion brought to a mint for coining〈史〉国王的造币提成权。
1.2
- count noun historical a thing claimed by a sovereign or feudal superior as a prerogative〈史〉君主特权。
词源
late Middle English: from Old French seignorage, from seigneur （see SEIGNEUR）.