Viaduct
Pronunciation : Vi`a*duct
Part of Speech : n.
Etymology : [L. via a way + -duct, as in aqueduct: cf. F. viaduc. See Via, and Aqueduct.]
Definition : Defn: A structure of considerable magnitude, usually with arches or supported on trestles, for carrying a road, as a railroad, high above the ground or water; a bridge; especially, one for crossing a valley or a gorge. Cf. Trestlework.
Source : Webster's Unabridged Dictionary, 1913