or CAYSTERS, in Ancient Geography, a river of Lydia and Ionia, which rises in the Montes Cibiani, and falls into the sea a little to the north of Ephesus.

At the foot of Mount Gallesus it is crossed by an ordinary bridge of three arches. It is sometimes called by the Turks Little Meandras, after the river Meander, which it resembles in its windings. At its mouth was the Asius Campus, noted for the flocks of wild fowl by which it was frequented. The Cayster was a favourite haunt of the wild swan.