- invisible infrared or ultraviolet light.
Origin of black light
First recorded in 1925–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for black light
- the invisible electromagnetic radiation in the ultraviolet and infrared regions of the spectrum
- Invisible ultraviolet radiation. Black light causes certain fluorescent materials to emit visible light.
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