tube

Definitions

General English

General Science

  • noun a long, hollow cylindrical organ that carries fluids around the body

Aviation

  • noun a long, hollow cylindrical device for holding or carrying fluids

Cars & Driving

  • noun a long hollow cylinder for carrying liquids or gas

Electronics

  • An active device consisting of a hermetically sealed envelope within which electrons are conducted between electrodes. The cathode is the source of electrons, the positive electrode to which they travel is the anode or plate, while other electrodes that may be present include control grids and screen grids. electron tubes may or may not contain a gas, and its presence and concentration affects the characteristics of said tubes. Such tubes have many applications, including their use in amplification, modulation, rectification, and oscillation. There are many examples, including CRTs, phototubes, pentodes, mercury-vapor tubes, and so on. When such a tube is evacuated to a degree that any residual gas present does not affect its electrical characteristics, it is called vacuum tube. Also known as electron tube, or valve.
  • A long and hollow object, usually cylindrical in shape, which serves for the passage of fluids or other materials, for the placement of cables, or to hold substances.

Media Studies

  • noun a cathode ray tube used to reproduce television images

Medical

  • noun a long hollow passage in the body
  • noun a soft flexible pipe for carrying liquid or gas
  • noun a soft plastic or metal pipe, sealed at one end and with a lid at the other, used to dispense a paste or gel

Slang

  • noun the London underground railway system, from the tubular construction of the tunnels. This nickname dates from the turn of the 20th century.
  • noun the hollow formed by a breaking wave. A surfer’s term from which the term of approbation, tubular, is derived.
  • noun a can of beer. (Tinnie is a slightly later synonym.).
  • noun a person. A vogue word among teenagers in the late 1980s; it was a synonym for dude, although it sometimes had the added sense of someone foolish or gormless.

Origin & History of “tube”

The ultimate origins of tube are unclear. It comes, probably via French tube, from Latin tubus ‘tube’. this was closely related to tuba ‘war trumpet’, source of English tuba (19th c.), but what their joint ancestor might be is not known.
http://www.dictionarycentral.com/definition/tube.html