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There are any number of meanings to "coils", depending on the context.

In a car or many other electrical contexts, it generally means a transformer, usually to increase voltage. In a car, this is used to fire the spark plugs. A special variety of this is the Tesla coil, which can be used for various showy purposes.

In a refrigerator or air conditioner, or other heat exchange context, this will generally mean the condenser coils, which carry the coolant so that it can be cooled after being condensed, and thus heated. This is essentially a radiator.

A coil of wire might also be used to create an electro-magnet, for running an electric motor or other purposes.

In other cases, like mattresses, they could simply be springs.

Presumably there are meanings in cellular Biology, chemistry, animal biology, hair dressing, and thousands of other fields.

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17y ago

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