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cold light

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noun
  1. light emitted by a source that is not incandescent, as from a firefly.
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Origin of cold light

First recorded in 1890–95
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for cold light

cold light

noun
  1. light emitted at low temperatures from a source that is not incandescent, such as fluorescence, phosphorescence, bioluminescence, or triboluminescence
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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