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English definition of “tube”

tube

noun [C] (PIPE)   /tub/
a long, hollow cylinder of plastic, metal, rubber, or glass, used for moving or containing liquids or gases: a copper tube She lay in the hospital, tubes going in and out of her. A tube is also one of the body’s hollow cylindrical structures that carries air or liquid: bronchial tubes
(Definition of tube noun (PIPE) from the Cambridge Academic Content Dictionary © Cambridge University Press)
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