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noun, Electricity.
a coil of many turns of insulated wire on an iron core, used for producing sparks.
an induction coil used to produce spark discharges
spark coil
An induction coil used to induce sparks in the spark plugs of an internal combustion engine. See more at induction coil.


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  • Spark-gap

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    noun 1. an alternating-current power source with a condenser discharging across a spark gap.

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