Coolant

//ˈkuːlənt// noun

noun ·Rare ·Advanced level

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

Synonyms

All synonyms
ammoniacarbon dioxideethericeliquid oxygenrefrigerant

Example

More examples

"In a six-hour procedure, space station commander Sunita Williams and Japanese astronaut Akihiko Hoshide successfully reconfigured ammonia coolant lines to bypass the suspect radiator, which may have been hit by space debris months earlier."

Etymology

From cool + -ant.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.