CULVERT
culvert
(noun) a transverse and totally enclosed drain under a road or railway
Source: WordNet® 3.1
Etymology
Noun
culvert (plural culverts)
A transverse channel under a road or railway for the draining of water.
Verb
culvert (third-person singular simple present culverts, present participle culverting, simple past and past participle culverted)
To channel (a stream of water) through a culvert.
Source: Wiktionary
Cul"vert (kl"vrt), n. Etym: [Prob. from OF. coulouere, F. couloir,
channel, gutter, gallery, fr. couler to flow. See Cullis.]
Definition: A transverse drain or waterway of masonry under a road,
railroad, canal, etc.; a small bridge.
Source: Webster’s Unabridged Dictionary 1913 Edition