The term 'Eastern Currency' can be summarized by the four-letter word 'Rial'. Rial is the currency of several countries in the Middle East and Central Asia, including Iran, Oman, and Yemen. It is also used in some parts of Africa, such as Somalia. The Rial is divided into smaller denominations, such as the Dirham and the Qirsh. The value of the Rial fluctuates depending on the country it is used in.