[ir-tish] 
| a river in central Asia, flowing NW from the Altai Mountains in China through NE Kazakhstan and the Russian Federation to the Ob River. ab. 1840 mi. (2960 km) long. |
| irtysh river | |
noun | |
| an Asian river that rises in the Altai Mountains in northern China and flows generally northwest to become a tributary of the Ob River [syn: Irtish] |