coolant

From cool + -ant.

• IPA^(key): /ˈkuːlənt/

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coolant (plural coolants)

1. A medium, usually fluid, used to draw heat from an object.

   Coolant is used in car engines and industrial processes, where excess heat could cause machine damage.

   • 1962 October, M. J. Wilson, “Three years of dieselisation at Devons Road depot”, in Modern Railways, page 264:

     Anti-freeze has not been found necessary, even in the most severe conditions, since the water is drained out if a locomotive spends any appreciable time out of service and in normal working conditions the coolant is always warm.

• octanol, octonal