WordWeb Online

1. Conduit consisting of a long hollow object (usually cylindrical) used to hold and conduct objects, liquids or gases
   - tubing
    
2. Electronic device consisting of a system of electrodes arranged in an evacuated glass or metal envelope
   - vacuum tube, thermionic vacuum tube, thermionic tube, electron tube, thermionic valve
    
3. A hollow cylindrical shape
   - pipe
    
4. (anatomy) any hollow cylindrical body structure
   - tube-shaped structure
    
5. [UK] 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'";
   - metro, underground [Brit], subway system [N. Amer], subway [N. Amer]

1. Provide with a tube or insert a tube into
    
2. Convey in a tube
   "inside Paris, they used to tube mail"
    
3. Ride or float on an inflated tube
   "We tubed down the river on a hot summer day"
    
4. Place or enclose in a tube

Derived forms: tubed, tubes, tubing

Type of: anatomical structure, bodily structure, body structure, bring, complex body part, conduit, convey, cylinder, electronic device, enclose, enfold, envelop, enwrap, furnish, offer, provide, rail, railroad [N. Amer], railroad line [N. Amer], railway [Brit, Cdn], railway line [Brit, Cdn], railway system [Brit, Cdn], render, ride, structure, supply, take, wrap

Part of: circuit, electric circuit, electrical circuit

Encyclopedia: Tube