cool·​ant | \ ˈkü-lənt How to pronounce coolant (audio) \

Definition of coolant

: a usually fluid cooling agent

Examples of coolant in a Sentence

Recent Examples on the Web The refrigerator only used 127 grams — roughly one-quarter of a pound — of HFC-134a, and the coolant was tightly sealed in a network of pipes somewhere deep inside. Phil Mckenna, The Courier-Journal, "I tried to buy a climate-friendly refrigerator from GE. What I got was a carbon bomb," 15 Mar. 2021 Hopkins and crewmate Victor Glover also vented residual ammonia coolant from two jumpers used to service the station's thermal control system, stowing the hoses in different locations for future use if needed. William Harwood, CBS News, "NASA astronauts take nearly seven-hour spacewalk outside International Space Station," 13 Mar. 2021 Rubins will float back out Friday with Japanese astronaut Soichi Noguchi to wrap up the solar panel prep work, and to vent and relocate ammonia coolant hoses. Fox News, "Spacewalking astronauts prep station for new solar wings," 1 Mar. 2021 Rubins will float back out Friday with Japanese astronaut Soichi Noguchi to wrap up the solar panel prep work, and to vent and relocate ammonia coolant hoses. Marcia Dunn, Chron, "Spacewalking astronauts prep station for new solar wings," 28 Feb. 2021 Snow acts as a great coolant during the day as its white color reflects solar energy and any warmth off its surface. Pedram Javaheri And Allison Chinchar, CNN, "Dramatic temperature shift in store for many frozen locations," 18 Feb. 2021 Once a popular coolant in air conditioners and in the manufacture of insulating foams, CFC-11 is considered a Class 1 ozone-depleting substance and is banned under the Montreal Protocol. Lindsey Mcginnis, The Christian Science Monitor, "Points of Progress: Atlanta tackles gentrification, and more," 26 Feb. 2021 The refrigeration feeds coolant into the trays and the process begins to form the 2-inch surface of ice. Josh Dubow, Star Tribune, "Tahoe outdoor NHL games could lead to more picturesque sites," 17 Feb. 2021 One thing to note: Like most refrigeration products, portable ice makers need to sit upright for a few hours before first plugging it in to make sure that the coolant is settled after shipping. Amina Lake Abdelrahman, Travel + Leisure, "The 8 Best Portable Ice Makers for Camping Trips, Kitchen Countertops, and More," 7 Feb. 2021

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'coolant.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of coolant

1915, in the meaning defined above

History and Etymology for coolant

cool entry 2 + -ant entry 1

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Time Traveler for coolant

Time Traveler

The first known use of coolant was in 1915

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Statistics for coolant

Last Updated

29 Mar 2021

Cite this Entry

“Coolant.” Dictionary, Merriam-Webster, Accessed 18 Apr. 2021.

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More Definitions for coolant



English Language Learners Definition of coolant

: a liquid that is used to cool an engine or machine

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More from Merriam-Webster on coolant

Nglish: Translation of coolant for Spanish Speakers

Britannica English: Translation of coolant for Arabic Speakers Encyclopedia article about coolant

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