coolant

noun

cool·​ant ˈkü-lənt How to pronounce coolant (audio)
: a usually fluid cooling agent

Examples of coolant in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Miami Beach, with sea breezes acting as a coolant, should be 79 at that hour, according to the weather service’s hourly forecast graph. Howard Cohen, Miami Herald, 27 Jan. 2025 Pumps circulate the coolant within the main component fluid chamber and pass it to a heat exchanger around the back for cooling down before pumping it back in. John Burek, PCMAG, 14 Jan. 2025 It’s housed inside Lawrence Livermore National Laboratory in California, where the $600 million machine is constantly consuming liquid coolant and electricity. Michael Kan, PCMAG, 10 Jan. 2025 When these bundles are placed together in the reactor, they are immersed in water that serves as a moderator and coolant. David Szondy, New Atlas, 28 Dec. 2024 See All Example Sentences for coolant

Word History

First Known Use

1915, in the meaning defined above

Time Traveler
The first known use of coolant was in 1915

Browse Nearby Entries

Cite this Entry

“Coolant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coolant. Accessed 3 Mar. 2025.

Kids Definition

coolant

noun
cool·​ant ˈkü-lənt How to pronounce coolant (audio)
: a usually fluid cooling substance

More from Merriam-Webster on coolant

Last Updated: - Updated example sentences
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!