The Orsinus, also called Mossynus, Mosynus, and Morsynos, was a river of ancient Caria, a tributary of the Maeander River, flowing in a northwestern direction, and discharging itself into the main river a few miles (km) below Antioch on the Maeander.
It is identified with the modern Dandala River.
This article incorporates text from a publication now in the public domain: Smith, William, ed. (1854–1857). "Orsinus". Dictionary of Greek and Roman Geography. London: John Murray.