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  1. Dictionary
    ultraviolet
    /ˌʌltrəˈvʌɪələt/

    adjective

    • 1. (of electromagnetic radiation) having a wavelength shorter than that of the violet end of the visible spectrum but longer than that of X-rays.

    noun

    • 1. the ultraviolet part of the spectrum; ultraviolet radiation.

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  2. dictionary.cambridge.org › dictionary › englishULTRAVIOLET | English meaning - Cambridge Dictionary

    Ultraviolet is a type of light that cannot be seen by human eyes, but causes the skin to darken in the sun. Learn more about its properties, uses and effects from Cambridge Dictionary, with examples and translations.

  3. en.wikipedia.org › wiki › UltravioletUltraviolet - Wikipedia

    Ultraviolet ( UV) light is electromagnetic radiation of wavelengths of 10–400 nanometers, shorter than that of visible light, but longer than X-rays. UV radiation is present in sunlight, and constitutes about 10% of the total electromagnetic radiation output from the Sun.

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  5. www.britannica.com › science › ultraviolet-radiationUltraviolet radiation | Definition, Examples, Effects,...

    May 31, 2024 · Ultraviolet radiation is a portion of the electromagnetic spectrum that lies between visible light and X-rays. It has various wavelengths, sources, and impacts on organisms, such as sunburn, tanning, aging, and cancer.

  6. www.merriam-webster.com › dictionary › ultravioletUltraviolet Definition & Meaning - Merriam-Webster

    Ultraviolet is a word that describes radiation or light beyond the visible spectrum at its violet end. Learn more about its usage, history, examples, and related words from Merriam-Webster Dictionary.

  7. www.dictionary.com › browse › ultravioletULTRAVIOLET Definition & Meaning | Dictionary.com

    Relating to electromagnetic radiation having frequencies higher than those of visible light but lower than those of x-rays, approximately 10 15 –10 16 hertz. Some animals, such as bees, are capable of seeing ultraviolet radiation invisible to the human eye. See more at electromagnetic spectrum.

  8. dictionary.cambridge.org › us › dictionaryULTRAVIOLET | definition in the Cambridge English Dictionary

    Ultraviolet is a type of light that cannot be seen by human eyes, but has a wavelength after violet. Learn how ultraviolet light affects the skin, the environment, and other phenomena with examples and translations.

  9. www.vocabulary.com › dictionary › ultravioletUltraviolet - Definition, Meaning & Synonyms | Vocabulary.com

    Use the adjective ultraviolet to describe light with a wavelength that's less than visible light, but longer than x-rays. You can't see ultraviolet light.

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