- a river in the Russian Federation in Asia, flowing N from the Sayan Mountains to the Kara Sea. 2,566 miles (4,080 km) long.
- a river in central Russia, in central Siberia, formed by the confluence of two headstreams in the Tuva Republic: flows west and north to the Arctic Ocean; the largest river in volume in Russia. Length: 4129 km (2566 miles)
