Synonyms of coolant

Noun

1. coolant, fluid, agent

usage: 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; "he added more coolant to the car's radiator"; "the atomic reactor used a gas coolant"; "lathe operators use an emulsion of oil and water as a coolant for the cutting tool"

Definition and meaning of coolant (Dictionary)