Coolant

['kuːl(ə)nt] or ['kʊlənt]

Definition

(noun.) 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'.

Typed by Ellie--From WordNet