What do a.m. and p.m. stand for?

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.
Cite This Source
Examples from the web for water jacket
  • During periods of low airflow, creosote collects on the water jacket walls.
  • The equipment for testing compressed gas type cylinders shall be of the water jacket type.
  • Although the water jacket is a welded system, openings are designed to add and remove water from the water jacket.
  • Power for battery charger and water jacket heater from an outside source.
  • Their works at the mine consist of two water jacket furnaces, capable of smelting from eighty to ninety tons of ore daily.
  • The reactor temperature was controlled by means of a water jacket.
  • Heat was supplied by a recirculating water bath that provided flow through the water jacket surrounding the purge and trap vessel.
  • The coolant is then routed back into the water jacket where it picks up more heat to repeat the process.
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
Cite This Source

Word of the Day

Difficulty index for water jacket

Few English speakers likely know this word

Word Value for water

Scrabble Words With Friends