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tube (toob) a hollow cylindrical organ or instrument. auditory tube eustachian tube; the narrow channel connecting the middle ear and the nasopharynx.

Tube may refer to: Construction. Tube (structure), the predominate structural system for constructing tall buildings in the United States between World War II and the 1990s

noun. a hollow cylinder or pipe of metal, glass, rubber, etc., usually long in proportion to its diameter, used for conveying fluids, etc. an instrument, part, organ, etc ...

tube, in electronics: see electron tube electron tube, device consisting of a sealed enclosure in which electrons flow between electrodes separated either by a vacuum (in a vacuum ...

tube (t b, ty b) n. 1. a. A hollow cylinder, especially one that conveys a fluid or functions as a passage. b. An organic structure having the shape or function of a tube; a duct ...

tube n. A hollow cylinder, especially one that conveys a fluid or functions as a passage. An organic structure having the shape or function of a


In medicine, intubation refers to the placement of a tube into an external or internal orifice of the body. Although the term can refer to endoscopic procedures, it is most often ...