ultraviolet

Meanings

1. 1
   adj

   relating to electromagnetic radiation with wavelengths shorter than visible violet light, conventionally about 10 to 400 nanometers

   Ultraviolet radiation from the Sun can damage DNA and cause sunburn.

2. 2
   noun

   the ultraviolet region of the electromagnetic spectrum, or radiation within that region

   The protective glass blocks most of the ultraviolet before it reaches the specimen.

Formed from ultra- ("beyond") + violet. The name places this radiation beyond the violet end of the visible spectrum, where its frequency is higher and its wavelength is shorter than visible violet light.

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