coolant
nounUK /ˈkuːlənt/
US /ˈkuːlənt/
A liquid that keeps a machine or engine from getting too hot.
The mechanic added coolant to the car's engine to stop it from overheating.
RELATED WORDS
OTHER MEANINGS
2. A substance used in cutting or machining to cool and lubricate tools and workpieces.
The machinist applied coolant to the drill to keep the metal from warping.
3. A fluid that carries heat away from a nuclear reactor core.
Engineers monitored the reactor's coolant to ensure safe operating temperatures.
4. Any gas or liquid used to lower temperatures in industrial or electronic systems.
The data center uses a special coolant to keep the servers from overheating.