radiator
US /ˈreɪ.di.eɪ.t̬ɚ/
UK /ˈreɪ.di.eɪ.t̬ɚ/
1.
a device for heating a room or building, consisting of a series of pipes through which steam or hot water circulates
:
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The old radiator in the living room needs to be replaced.
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Turn up the radiator; it's cold in here.
2.
a device for cooling the engine of a motor vehicle or aircraft, typically a block of thin tubes or fins through which coolant circulates
:
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The car overheated because of a faulty radiator.
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He checked the coolant level in the car's radiator.