- a river in central Asia, flowing NW from the Pamirs to the Aral Sea. About 1,400 miles (2,250 km) long.
- a river in central Asia, rising in the Pamirs and flowing northwest through the Hindu Kush and across Turkmenistan and Uzbekistan to its delta in the Aral Sea: forms much of the N border of Afghanistan and is important for irrigation. Length: 2400 km (1500 miles)
