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xenon arc

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noun
  1. an electric arc between two metal electrodes enclosed in a quartz bulb and contained in a xenon atmosphere, used mainly as a high-intensity light source in motion-picture projectors and studio spotlights.
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Origin of xenon arc

First recorded in 1970–75
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018