spark gap

noun

: a space between two high-potential terminals (as of an induction coil or spark plug) through which pass discharges of electricity
also : a device having a spark gap

Examples of spark gap in a Sentence

Recent Examples on the Web
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Driving the spark gaps required fabricating a miniature Tesla coil that could be fitted into the heel of a customized shoe. — Stephen Cass, IEEE Spectrum, 23 Apr. 2019

Word History

First Known Use

1889, in the meaning defined above

Time Traveler
The first known use of spark gap was in 1889

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Cite this Entry

“Spark gap.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/spark%20gap. Accessed 13 Oct. 2026.

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