coolant

/หˆkuหlษ™nt/

IPA: /K UW1 L AH0 N T/

noun
  1. 1

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

    โ€œCoolant is used in car engines and industrial processes, where excess heat could cause machine damage.โ€

Source: https://en.wiktionary.org/wiki/coolant