A river of southwest Asia rising in eastern Turkey and flowing about1, 850 km(1, 150 mi) southeast through Iraq to the Euphrates River. It was a major transportation route in ancient times.

• 底格里斯河亚洲西南部一条发源于土耳其东部的流程约1，850公里（1，150英里）的河流，向东南方向贯穿伊拉克汇入幼发拉底河，在古代是一条重要的运输线