conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
[ Syn: tubing ]
electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
[ Syn: vacuum tube , thermionic vacuum tube , thermionic tube , electron tube , thermionic valve ]
a hollow cylindrical shape
[ Syn: pipe ]
(anatomy) any hollow cylindrical body structure
[ Syn: tube-shaped structure ]
an electric railway operating below the surface of the ground (usually in a city); in Paris the subway system is called the `metro and in London it is called the `tube or the `underground
[ Syn: metro , underground , subway system , subway ]
tube (n.)
provide with a tube or insert a tube into
convey in a tube; inside Paris, they used to tube mail'
ride or float on an inflated tube; We tubed down the river on a hot summer day'
place or enclose in a tube