- adjective used for cooling or freezing purposes
- noun a substance used to provide cooling or freezing either as the working substance of a refrigerator or by direct absorption of heat
- A substance which serves to cool an object, material, region, component, device, piece of equipment, and so on. At cryogenic temperatures neon may be used as a refrigerant, at low temperatures nitrogen could be utilized, and air may be used at high temperatures, as in its cooling of heat sinks.
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