Tube
(anatomy) any hollow cylindrical body structure
Synonyms
Derivation
An electric railway operating below the surface of the ground (usually in a city)
Examples
In Paris the subway system is called the `metro' and in London it is called the `tube' or the `underground'
Conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects or liquids or gases
Synonyms
Type of
Has types
Derivation
Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
Type of
Has types
Convey in a tube
Ride or float on an inflated tube
Type of
Examples
We tubed down the river on a hot summer day