cool·​ant | \ ˈkü-lənt How to pronounce coolant (audio) \

Definition of coolant

: a usually fluid cooling agent

Examples of coolant in a Sentence

Recent Examples on the Web It is constantly pumped up, treated and stored in tanks, while part of it is recycled as coolant. Fox News, "Japan advances plan to release Fukushima plant's radioactive water into the sea," 1 Feb. 2020 But even without its cryogenic coolant, the observatory was still a frigid 28 degrees above absolute zero -- minus 410 degrees Fahrenheit — behind its protective solar panel. William Harwood, CBS News, "The end of the road for NASA's Spitzer Space Telescope," 29 Jan. 2020 Mission Control in Houston said after a coolant line leak stopped., "News of the Day From Across the Nation," 25 Jan. 2020 Because twist fridges work with materials like rubber, instead of coolants, their environmental impact is enticingly lower. Jordan Wilkerson, Dallas News, "UT Dallas researchers create fridges with a twist," 23 Jan. 2020 In 2011, the Tokyo Electric Power Company’s nuclear plant there underwent a process identical to Chernobyl: a loss of coolant that provoked a meltdown. Steve Donoghue, The Christian Science Monitor, "'Midnight in Chernobyl' explores the world's worst nuclear disaster," 31 Jan. 2019 The pan features oil and coolant passages that increase cooling capacity by 25 percent compared to the LT1 in the C7. Dan Carney, Popular Science, "The Corvette is finally the supercar it deserves to be," 2 Jan. 2020 Buildup of grime is fairly common in coolant systems, so there could be a restriction somewhere. Zachary Palmer, Popular Mechanics, "How To Fix Your Car's Heater," 11 Nov. 2019 The ozone layer over the Antarctic is expected to recover by 2070 as compounds used as coolants, called chlorofluorocarbons, decline. Ashley Strickland, CNN, "The Antarctic ozone hole is the smallest since it was discovered," 21 Oct. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coolant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of coolant

1915, in the meaning defined above

History and Etymology for coolant

cool entry 2 + -ant entry 1

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Time Traveler for coolant

Time Traveler

The first known use of coolant was in 1915

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Statistics for coolant

Last Updated

13 Feb 2020

Cite this Entry

“Coolant.” Dictionary, Merriam-Webster, Accessed 26 Feb. 2020.

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How to pronounce coolant (audio)

English Language Learners Definition of coolant

: a liquid that is used to cool an engine or machine

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More from Merriam-Webster on coolant

Spanish Central: Translation of coolant

Nglish: Translation of coolant for Spanish Speakers

Britannica English: Translation of coolant for Arabic Speakers Encyclopedia article about coolant

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