aqueduct
/ˈækwɪdʌkt/noun
1- a bridge or viaduct carrying a waterway over a valley or other gap（架于山谷或沟壑上的）高架渠, 桥管。
1.1
- an artificial channel for conveying water人工水渠。
1.2
- Anatomy a small canal containing fluid【剖】导管。
词源
mid 16th cent.: from obsolete French （now aqueduc）， from Latin aquae ductus 'conduit'， from aqua 'water' + ducere 'to lead'.