easternmost island of Cape Verde, in the Atlantic Ocean, 300 miles (500 km) off the western African coast. It has an area of 239 square miles (620 square km) and rises to an elevation of 1,269 feet (387 m). The chief town is Sal Rei, on the northwest coast. Salt and archil (a plant yielding a violet dye) are produced. Pop. (1990 prelim.) 3,457.