aqueduct
Concise Oxford English Dictionary © 2008 Oxford University Press:
aqueduct /ˈakwɪdʌkt/
▶noun
- 1 a bridge or viaduct carrying a waterway over a valley or other gap.
- 2 Anatomy a small duct in the body containing fluid.
– origin C16: from obs. Fr., from L. aquae ductus ‘conduit’, from aqua ‘water’ + ducere ‘to lead’.
'aqueduct' also found in these Oxford entries:

