conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases | a tubular acoustic device inserted in the exhaust system that is designed to reduce noise |
an electric railway operating below the surface of the ground (usually in a city) | short tube attached to the muzzle of a gun that deadens the sound of firing |
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope | |
(anatomy) any hollow cylindrical body structure | |
a hollow cylindrical shape | |