Special Drawing Right.
An artificial currency unit based upon several national currencies. The Special Drawing Right serves as the official monetary unit of several international organizations including the International Monetary Fund, and acts as a supplemental reserve for national banking systems. For members of the IMF, the Special Drawing Rights can be used to settle trade balances between countries and to repay the IMF.
An IMF member country has to supply its own currency to another member country in exchange for SDRs, unless that country already holds a certain specified amount of SDRs.