canal
/kəˈnæl; kə`næl/ n
1 channel cut through land for boats or ships to travel along, or to carry water for irrigation 运河
The Suez Canal joins the Mediterranean and the Red Sea. 苏伊士运河连接著地中海和红海. Cf 参看 river 1.
2 tube through which air or food passes in a plant or an animal's body （植物中或动物体内空气或食物通过的）管道
the alimentary canal 消化道.