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.
The mission was initially expected to take six months, but the spacecraft suffered a coolant leak, forcing the trip to be extended. Miranda Jeyaretnam, TIME, 18 Mar. 2025 His return was delayed due to a coolant leak in the Russian spacecraft designated to bring him home, making his mission the longest single spaceflight for a U.S. astronaut. Amanda Castro, Newsweek, 18 Mar. 2025 Antifreeze coolant is usually a mixture of water and glycol, a chemical that prevents the engine from freezing and overheating. Hayleigh Evans, The Arizona Republic, 7 Dec. 2024 Eventually, the coolant ran out, but not until WISE had successfully completed its science goals. Toshi Hirabayashi, Discover Magazine, 5 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 Words

Cite this Entry

“Coolant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coolant. Accessed 29 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
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