A sword with a curved blade is called a scimitar. The scimitar is a type of sword that is typically associated with the Middle East and North Africa, and it has a distinct curved blade that is designed for slashing and cutting. Scimitars were used by various cultures throughout history, including the Persians, Ottomans, and Arabs. The curved blade of the scimitar made it well-suited for mounted warfare, as it could be used to deliver powerful blows from horseback. Today, the scimitar is often used in ceremonial contexts and is also a popular weapon in various forms of martial arts.