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.
That design relies on passive heat pipes rather than mechanical coolant pumps to pull heat from the nuclear core. — Aman Tripathi, Interesting Engineering, 24 Oct. 2026 Meanwhile, Paladin accidentally tracks down the Butcherbird Killer, a female synthezoid who’s leaking coolant just like Vision. — Tasha Robinson, Vulture, 21 Oct. 2026 An air-blast system is included; the optional Flood Coolant module adds coolant delivery and chip collection for heavier metal work, while the Dust Collection module keeps wood and plastic jobs clean. — New Atlas, 14 Oct. 2026 And to further lean into AI, management cited NVIDIA certification of its coolant distribution units with a pipeline above $1 billion. — Josh Brown,sean Russo, CNBC, 12 Oct. 2026 See All Example Sentences for coolant

Word History

Etymology

cool entry 2 + -ant entry 1

First Known Use

1915, in the meaning defined above

Time Traveler
The first known use of coolant was in 1915

Rhymes for coolant

See All Rhymes for coolant

Browse Nearby Words

coolamon
coolant
cool bath
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Cite this Entry

“Coolant.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/coolant. Accessed 1 Nov. 2026.

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Kids Definition

coolant

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

More from Merriam-Webster on coolant

Britannica.com: Encyclopedia article about coolant

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