single currency
noun
1- a currency used by all the members of an economic federation（经济同盟成员国使用的）单一货币。
1.1
- （亦作single European currency）the currency (the euro) which replaced the national currencies of twelve member states of the European Union in 2002欧洲单一货币（2002年欧盟12个成员国用以取代各国货币的欧元）。