coolant
[koo-luh nt]
- a substance, usually a liquid or a gas, used to reduce the temperature of a system below a specified value by conducting away the heat produced in the operation of the system, as the liquid in an automobile cooling system or the fluid that removes heat from the core of a nuclear reactor.
- a lubricant that dissipates the heat caused by friction.
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Origin of coolant
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for coolant
Contemporary Examples of coolant
Once the system is powered on, coolant flows to the bottom, extracts heat from the soil, and flows back up to be cooled again.
coolant
- a fluid used to cool a system or to transfer heat from one part of it to another
- a liquid, such as an emulsion of oil, water, and soft soap, used to lubricate and cool the workpiece and cutting tool during machining
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for coolant
Online Etymology Dictionary, © 2010 Douglas Harper