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Aqueduct

1. A conductor, conduit, or artificial channel for conveying water, especially one for supplying large cities with water.

The term is also applied to a structure (similar to the ancient aqueducts), for conveying a canal over a river or hollow; more properly called an aqueduct bridge.

2. (Science: anatomy) a canal or passage; as, the aqueduct of sylvius, a channel connecting the third and fourth ventricles of the brain.

Origin: f. Aqueduc, OF. Aqueduct (Cotgr), fr. L. Aquaeductus; aquae, gen. Of aqua water _ ductus a leading, ducere to lead. See Aqua, duke.