Aziscohos Lake (uh-ZIS-kuh-hahs), reservoir, Oxford co., W Maine, on Magalloway R., 45 mi/72 km NW of Rumsford, and 3 mi/4.8 km E of N.H. state line; c.14 mi/23 km long; 45°55'N 70°58'W. Formed by dam. Aziscohos Mt. (elev. 3,215 ft/980 m) to S. Sometimes spelled Aziscoos.