viaduct

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vi·a·duct / ˈvīəˌdəkt/ • n. a long bridgelike structure, typically a series of arches, carrying a road or railroad across a valley or other low ground.

viaduct

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viaduct. Structure, often a series of arches, carrying a road, railway, etc., over a valley.

viaduct

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viaduct XIX. f. L. via VIA1, after aqueduct.