See also: blacklight

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Etymology edit

black +‎ light, since ultraviolet light is invisible to the human eye.

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  • (file)

Noun edit

black light (countable and uncountable, plural black lights)

  1. (countable) A light bulb that emits ultraviolet light, usually used to create the illusion that anything white is glowing.
  2. (uncountable, slang) ultraviolet radiation/light

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