conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases | a cylindrical container for oxygen or compressed air |
an electric railway operating below the surface of the ground (usually in a city) | a chamber within which piston moves |
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope | a surface generated by rotating a parallel line around a fixed line |
(anatomy) any hollow cylindrical body structure | a solid bounded by a cylindrical surface and two parallel planes (the bases) |
a hollow cylindrical shape | |