mercury arc

noun

Definition of mercury arc

: an electric discharge through mercury vapor in a glass or quartz tube emitting a blue-green light rich in actinic and ultraviolet rays and used for various purposes (as for water sterilization, in photography, and in a rectifier)

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Cite this Entry

“Mercury arc.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/mercury%20arc. Accessed 11 December 2019.

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