درم is a traditional Persian coin that was widely used in ancient Persia and throughout the Islamic world. It was made of silver and served as a standard currency for trade and commerce. The term "درم" is derived from the Greek word "drachma," reflecting the historical influence of various cultures on Persian currency. The value of درم varied over time and across regions, but it played a crucial role in the economy of the Sassanian Empire and later Islamic states. Today, درم is often studied by historians and numismatists interested in the economic history of Iran and the broader Middle East.