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[toob, tyoob] /tub, tyub/
a hollow, usually cylindrical body of metal, glass, rubber, or other material, used especially for conveying or containing liquids or gases.
a small, collapsible, cylinder of metal or plastic sealed at one end and having a capped opening at the other from which paint, toothpaste, or some other semifluid substance may be squeezed.
Anatomy, Zoology. any hollow, cylindrical vessel or organ:
the bronchial tubes.
  1. any hollow, elongated body or part.
  2. the united lower portion of a gamopetalous corolla or a gamosepalous calyx.
Electronics. electron tube.
  1. television.
  2. a television set.
the tubular tunnel in which an underground railroad runs.
the railroad itself.
Surfing Slang. the curled hollow formed on the underside of a cresting wave.
British, subway (def 1).
Australian Slang. a can of beer.
Older Slang. a telescope.
verb (used with object), tubed, tubing.
to furnish with a tube or tubes.
to convey or enclose in a tube.
to form into the shape of a tube; make tubular.
down the tube / tubes, Informal. into a ruined, wasted, or abandoned state or condition.
Origin of tube
1590-1600; < Latin tubus pipe
Related forms
tubeless, adjective
tubelike, adjective
multitube, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for tube
  • Ear tube insertion involves placing tubes through the eardrums.
  • It's easy to blame the tube for fostering a flight from serious issues into glitter, froth, and measuring tape.
  • The tube system was severely disrupted by a strike over staffing cuts.
  • If more wind shifts tilt this tube so that one end touches the ground, a tornado is born.
  • Grab a piece of wholegrain bread with peanut butter and a bit of jelly freeze tube yogurt and eat it as ice-cream.
  • As the superheated air cools it produces a resonating tube of partial vacuum surrounding the lightning's path.
  • Recently a group of biologists has offered a theory that they say explains, if not tube socks, then nearly everything else.
  • If your canvas starts to warp or wrinkle, roll it firmly around a gift-wrap tube and leave it for several hours.
  • Through the vein they threaded a tube called a cannula into the right atrium, an upper chamber inside my heart.
  • For all the other materials, the weight gets down to the bottom of the tube.
British Dictionary definitions for tube


a long hollow and typically cylindrical object, used for the passage of fluids or as a container
a collapsible cylindrical container of soft metal or plastic closed with a cap, used to hold viscous liquids or pastes
  1. short for Eustachian tube, Fallopian tube
  2. any hollow cylindrical structure
  1. the lower part of a gamopetalous corolla or gamosepalous calyx, below the lobes
  2. any other hollow structure in a plant
(Brit) the tube
  1. Also called the underground. an underground railway system US and Canadian equivalent subway
  2. the tunnels through which the railway runs
  3. the train itself
  4. (capital) trademark the London underground railway system
  1. another name for valve (sense 3)
  2. See electron tube, cathode-ray tube, television tube
(slang) the tube, a television set
(Brit, slang) a stupid or despicable person
(Austral, slang) a bottle or can of beer
(surfing) the cylindrical passage formed when a wave breaks and the crest tips forward
an archaic word for telescope
verb (transitive)
to fit or supply with a tube or tubes
to carry or convey in a tube
to shape like a tube
Derived Forms
tubeless, adjective
tube-like, adjective
Word Origin
C17: from Latin tubus
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for tube

1610s, from Middle French tube (mid-15c.), from Latin tubus "tube, pipe," of unknown origin. The London subway was christened the Twopenny Tube before it even opened (H.D. Browne, in the "Londoner" of June 30, 1900); tube for "cylindrical railway tunnel" is attested from 1847. The meaning "TV as a medium" is from 1959, short for cathode ray tube or picture tube. Tube top as a women's clothing style is attested from 1972. Tube steak is attested from 1963 as "frankfurter," slang meaning "penis" is recorded by mid-1980s. Tubing as a recreational pastime is recorded from 1975.

Online Etymology Dictionary, © 2010 Douglas Harper
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tube in Medicine

tube (tōōb, tyōōb)

  1. A hollow cylinder, especially one that conveys a fluid or functions as a passage.

  2. An anatomical structure or organ having the shape or function of a tube; a duct.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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tube in Technology

1. A CRT terminal. Never used in the mainstream sense of TV; real hackers don't watch TV, except for Loony Toons, Rocky & Bullwinkle, Trek Classic, the Simpsons, and the occasional cheesy old swashbuckler movie.
2. electron tube.
3. (IBM) To send a copy of something to someone else's terminal. "Tube me that note."
[Jargon File]

The Free On-line Dictionary of Computing, © Denis Howe 2010
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Idioms and Phrases with tube


The American Heritage® Idioms Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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