A curved sword is commonly known as a scimitar. The scimitar is a type of sword with a curved blade that originated in the Middle East and is often associated with various cultures of the region, such as the Ottoman Empire and the Arab world. The blade of a scimitar typically has a single-edged curve, and the shape can vary from a gentle curve to a more pronounced, almost semicircular shape. Scimitars are known for their effective slashing and cutting abilities.