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tunnel

(Encyclopedia)tunnel, underground passage usually made without removing the overlying rock or soil. Although tunnels are approximately horizontal, they must be built with sufficient gradient for proper drainage. Tu...

Moffat Tunnel

(Encyclopedia)Moffat Tunnel mŏfˈət [key], railroad tube, 24 ft (7.3 m) high, 18 ft (5.5 m) wide, and 6.4 mi (10.3 km) long, N central Colo., in the Continental Divide, NW of Denver. One of the country's longest ...

Lötschberg Tunnel

(Encyclopedia)Lötschberg Tunnel: see under Lötschberg Railway. ...

Gotthard Tunnel

(Encyclopedia)Gotthard Tunnel: see Saint Gotthard, mountain group. ...

Channel Tunnel

(Encyclopedia)Channel Tunnel, popularly called the “Chunnel,” a three-tunnel railroad connection running under the English Channel, connecting Folkestone, England, and Calais, France. The tunnels are 31 mi (50 ...

Rove Tunnel

(Encyclopedia)Rove Tunnel rōv, Fr. rôv [key], southern section of the Marseilles-Rhône Canal, 4.5 mi (7.2 km) long and 72 ft (22 m) wide, Bouches-du-Rhône dept., SE France; opened 1927. Starting near the villag...

tunnel diode

(Encyclopedia)tunnel diode: see diode.

wind tunnel

(Encyclopedia)wind tunnel, apparatus for studying the interaction between a solid body and an airstream. A wind tunnel simulates the conditions of an aircraft in flight by causing a high-speed stream of air to flow...

carpal tunnel syndrome

(Encyclopedia)carpal tunnel syndrome: see repetitive stress injury. ...

Chesapeake Bay Bridge-Tunnel

(Encyclopedia)Chesapeake Bay Bridge-Tunnel, officially the Lucius J. Kellam, Jr. Bridge-Tunnel, 17.6 mi (28.2 km) long, across the mouth of Chesapeake Bay, E Va., connecting Cape Charles with Norfolk, Va. Opened in...