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Noun: coolant  koo-lunt
  1. 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"

Derived forms: coolants

Type of: agent, fluid

Encyclopedia: Coolant