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black light

noun

  1. invisible infrared or ultraviolet light.


black light

noun

  1. the invisible electromagnetic radiation in the ultraviolet and infrared regions of the spectrum
“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

black light

  1. Invisible ultraviolet radiation. Black light causes certain fluorescent materials to emit visible light.
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Word History and Origins

Origin of black light1

First recorded in 1925–30
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Example Sentences

Several months before his death in December 2021, Slim 400 described in an interview that he saw a “black light, or a dark cloud” after the 2019 shooting.

It used to be that you could put a black light at the edge of a cornfield at night and expect a bountiful harvest of moths the next morning.

When they shine a black light on the coral, organic compounds in the coral cause it to fluoresce.

The camera lingers on their enraptured visages, allowing their furtive looks to bloom under the neon glow of a clubbing black light or the soft touch of the sun as they lounge in a park.

But not bright—instead a black light with a violet and white core.

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