a city on the western coast of the island of Sardinia, in a fine valley on the northern bank of the Termo. It is well built and paved; it is the see of a bishop; and has a cathedral, a diocesan seminary, and several schools. The harbour is safe, being sheltered by the islet of the same name. Pop. 6000. Long. 8° 25'. 31". E. Lat. 40° 16'. 40". N.