Coolant

//ˈkuːlənt// noun

Definitions

Noun
  1. 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."

  2. 2
    a fluid agent (gas or liquid) that produces cooling; especially one used to cool a system by transferring heat away from one part to another wordnet

Etymology

From cool + -ant.

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