| a river in E Africa, flowing NNW from Lake Tana in Ethiopia into the Nile at Khartoum: a tributary of the Nile. ab. 950 mi. (1530 km) long. |
| Blue Nile A river of northeast Africa. It is the chief headstream of the Nile and flows about 1,609 km (1,000 mi) from northwest Ethiopia to Sudan. At Khartoum it merges with the White Nile to form the Nile River proper. |