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water jacket

a water-filled casing or compartment used to water-cool something, as an engine or machine gun.
Origin of water jacket


[waw-ter-jak-it, wot-er-] /ˈwɔ tərˌdʒæk ɪt, ˈwɒt ər-/
verb (used with object)
to surround or fit with a water jacket.
1875-80 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for water-jacket
Historical Examples
  • In a steam-boiler the burning fuel is enclosed either by fire-brick or a "water-jacket," forming part of the boiler.

    How it Works Archibald Williams
  • Fixed: a barrel-casing, which is also a water-jacket, and breech-casing.

    The Romance of Modern Invention Archibald Williams
  • He pulled the Maxim's block and threw it away; shot the water-jacket full of holes.

    Triplanetary Edward Elmer Smith
  • A double cylinder formed a water-jacket, connected with a water and steam chamber above, and a water-chamber below.

    Automobile Biographies Lyman Horace Weeks
  • In the second place, the size of the cylinders and the consequently large extent of water-jacket surface, complicated the problem.

    Langley Memoir on Mechanical Flight, Parts I and II S. P. (Samuel Pierpont) Langley and Charles M. (Charles Matthews) Manly
  • The loss of heat through the water-jacket is thus less in the case of a high-compression than in that of a low-compression motor.

    Aviation Engines Victor Wilfred Pag
  • It is operated by the gases of the explosion, has a water-jacket that allows 3000 rounds to be fired without refilling.

  • It does not heat fast, so has no need of a water-jacket, any surplus heat being removed by a system of radiation.

    The Romance of Modern Invention Archibald Williams
  • To the right is the fire-box, surrounded on all sides by a water-jacket in direct communication with the barrel of the boiler.

    How it Works Archibald Williams
  • They are all water-cooled, having a water-jacket of (p. 050) sheet metal entirely surrounding the barrel.

    The Emma Gees Herbert Wes McBride
British Dictionary definitions for water-jacket

water jacket

a water-filled envelope or container surrounding a machine, engine, or part for cooling purposes, esp the casing around the cylinder block of a pump or internal-combustion engine Compare air jacket
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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