ultraviolet

Noun · Adjective
US[uhl-truh-vahy-uh-lit]/ˌʌltrəˈvaɪəlɪt/5 syllables
Synonyms: ultraviolet radiationultraviolet lightultraviolet illuminationUV

Open English WordNet

Noun (1)

  1. radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X raysSynonyms: ultraviolet radiationultraviolet lightultraviolet illuminationUVType of actinic radiation, actinic rayKinds sunray, sun-ray

Adjective (1)

  1. having or employing wavelengths shorter than light but longer than X-rays; lying outside the visible spectrum at its violet end“ultraviolet radiation”“an ultraviolet lamp”Opposite seeableSimilar invisible, unseeable

Related words ultraviolet radiation noun

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haphazardadjective

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Webster's Dictionary (1913)

Ul′tra·vi′o·let adjective

Origin: Pref. ultra- + violet.

Physics Lying outside the visible spectrum at its blue-violet end; — said of light more refrangible (i. e. having a shorter wavelength) than the extreme violet rays of the visible spectrum. Electromagnetic radiation with wavelengths shorter than those of ultrviolet light are not usually considered as light waves, but are classified differently. The ultraviolet region of the electromagnetic spectrum is generally considered as comprising those electromagnetic emissions with wavelengths lying between those of visible light and those of X-rays, i. e. between 4000 Angstroms and 100 Angstroms.

Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54 · with additions: +PJC

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