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tr.v. wa·ter-cooled, wa·ter-cool·ing, wa·ter-cools
To cool (an engine) with water, especially circulating water.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(Mechanical Engineering) (tr) to cool (an engine, etc) by a flow of water circulating in an enclosed jacket. Compare air-cool
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
to cool by means of water, esp. by water circulating in pipes or a water jacket.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
Past participle: water-cooled
Collins English Verb Tables © HarperCollins Publishers 2011