aqueduct

=__Aqueduct__= An **aqueduct** is an artificial channel that is constructed to convey water from one location to another. The word is derived from the Latin //aqua//, "water," and //ducere//, "to lead." The word is also used for any bridge that carries water, similar to viaducts, though they carry water instead of a road or railway. Sufficiently large aqueducts may also be usable by boats or ships. While a road bridge often carries the roadway at a more elevated level than the rest of the road, such a variation of height is not possible for an aqueduct.