black light

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English[edit]

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Etymology[edit]

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

Alternative forms[edit]

Noun[edit]

black light (plural black lights)

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

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