large lake in SE Siberia: deepest lake in the world, c. 5,316 ft (1,620 m) at maximum depth; 12,162 sq mi (31,499 sq km)
See Baikal in American Heritage Dictionary 4
or Bay·kal
A lake of south-central Russia. Over 636 km long (394 mi), it is the largest freshwater lake in Eurasia and the world's deepest lake, with a maximum known depth of 1,742.2 m (5,712 ft).