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.
An advanced reactor An advanced reactor that uses liquid fuel—molten salts—as both fuel and coolant is called a Liquid-Fueled Molten Salt Reactor (LF-MSR). Aman Tripathi, Interesting Engineering, 15 Oct. 2025 Oil, transmission, coolant … any fluid in your vehicle needs to be maintained at the appropriate level and changed according to the maintenance schedule for your vehicle. Eric D. Lawrence, USA Today, 10 Oct. 2025 Still others make use of nuclear fuel and coolant combinations previously attempted in much larger reactors, such as high-temperature gas reactors, sodium fast reactors and even molten salt reactors. Aditi Verma, The Conversation, 19 Sep. 2025 While solid materials can easily be shaved down, these chambers need to have enough space for coolant to travel through channels. Gwendolyn Rak, IEEE Spectrum, 17 Sep. 2025 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 22 Oct. 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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