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
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Replacing water as the nuclear reactor’s coolant is much more problematic. Robin George Andrews, Scientific American, 19 May 2026 The data acquired from KAERI will assist in validating the safety parameters and coolant mechanics of the Natrium design for US regulatory frameworks. Aman Tripathi, Interesting Engineering, 17 May 2026 Those small issues that started earlier—a weak battery or marginal coolant levels—often finally fail during long, hot drives. Christopher Elliott, Forbes.com, 16 May 2026 These pump coolant through pipes to dissipate heat from servers rather than evaporating water as has been the case in the past. Jonathan M. Gitlin, ArsTechnica, 28 Apr. 2026 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 21 May. 2026.

Kids Definition

coolant

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

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