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mercury arc

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noun Electricity.
  1. a bluish-green electric arc that has passed through a mercury-vapor cathode.
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Origin of mercury arc

First recorded in 1915–20
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for mercury arc

Historical Examples

  • Another lamp differing widely in appearance from the preceding arcs may be described here because it is known as the mercury-arc.

    Artificial Light

    M. Luckiesh

  • For example, assume that phosphorescent zinc sulphide is excited by the light from a mercury-arc.

    Artificial Light

    M. Luckiesh

  • It is a device broadly similar to the mercury-arc lamp produced by Peter Cooper Hewitt.

  • The mercury-arc rectifier proper consists of a glass bulb containing vacuum and a small amount of mercury.

  • The circuit of a mercury-arc rectifier charging outfit is shown in Fig. 415.


British Dictionary definitions for mercury arc

mercury arc

noun
    1. an electric discharge through ionized mercury vapour, producing a brilliant bluish-green light containing ultraviolet radiation
    2. (as modifier)a mercury-arc rectifier See also ignitron
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012