conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases | a cylindrical container that holds liquids |
an electric railway operating below the surface of the ground (usually in a city) | a tube through which a bullet travels when a gun is fired |
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope | any of various units of capacity |
(anatomy) any hollow cylindrical body structure | the quantity that a barrel (of any size) will hold |
a hollow cylindrical shape | a bulging cylindrical shape; hollow with flat ends |