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ultraviolet

From Wiktionary, the free dictionary

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English

English Wikipedia has an article on:
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Etymology

    Etymology tree
    Proto-Indo-European *h₂el-
    Latin ūls
    Proto-Indo-European *-teros?
    Latin -ter
    Latin -ā
    English ultra-
    Latin viola
    Old French -ette
    Old French violettebor.
    Middle English violet
    English violet
    English ultraviolet

    From ultra- (“beyond”) +‎ violet (“violet”).

    Pronunciation

    Adjective

    ultraviolet (comparative more ultraviolet, superlative most ultraviolet)

    1. Of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 to 10 nanometres.
      • 2023 May 18, Reuters, “Chipmakers look to Japan as worries about China grow”, in CNN Business‎:
        Micron said in a statement that it would bring extreme ultraviolet (EUV) technology to Japan, becoming the first semiconductor company to do so, and expected to invest up to 500 billion yen ($3.6 billion) with support from the Japanese government.
    2. (figurative, physics) Relating to very high energies or very small distances or time spans.
      Antonym: infrared
      • 2004, Barton Zwiebach, A First Course in String Theory, →ISBN, Figure 23.1, page 519:
        A one-loop Feynman graph that represents a virtual process. In the limit in which the virtual process involves short distances or high momenta, one may find an ultraviolet divergence in the corresponding amplitude.
      • 2009, Herbert W. Hamber, Quantum Gravitation: The Feynman Path Integral Approach, →ISBN, page vii:
        Some have advocated the search for a new theory of quantum gravity, a theory which does not suffer from ultraviolet infinity problems.
      • 2017, David F. Chernoff, S.-H. Henry Tye, “Inflation, string theory and cosmic strings”, in Wei-Tou Ni, editor, One Hundred Years of General Relativity […], volume 2, →ISBN, page 275:
        Since current gravitational observations are insensitive to quantum effects, one may wonder why an ultraviolet completion of the gravity theory is needed if inflation, in fact, occurs several orders of magnitude below the Planck scale.

    Derived terms

    Translations

    Noun

    ultraviolet (countable and uncountable, plural ultraviolets)

    1. Ultraviolet colour.

    Translations

    See also

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    Danish

    Adjective

    ultraviolet

    1. ultraviolet

    Inflection

    More information positive, comparative ...

    1 When an adjective is applied predicatively to something definite,
    the corresponding "indefinite" form is used.
    2 The "indefinite" superlatives may not be used attributively.

    References

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    French

    Etymology

    From ultra- +‎ violet.

    Pronunciation

    Adjective

    ultraviolet (feminine ultraviolette, masculine plural ultraviolets, feminine plural ultraviolettes)

    1. ultraviolet

    Noun

    ultraviolet m (plural ultraviolets)

    1. ultraviolet (light)

    Further reading

    Indonesian

    Etymology

    Internationalism, from ultra- +‎ violet.

    Pronunciation

    Adjective

    ultraviolet

    1. ultraviolet (of electromagnetic radiation with wavelengths from 380 to 10 nanometres)
      Synonym: ultraungu

    Noun

    ultraviolet

    1. ultraviolet (ultraviolet color)
      Synonym: ultraungu

    Further reading

    Romanian

    Etymology

    Borrowed from French ultraviolet. Equivalent to ultra- +‎ violet.

    Adjective

    ultraviolet m or n (feminine singular ultravioletă, masculine plural ultravioleți, feminine and neuter plural ultraviolete)

    1. ultraviolet

    Declension

    More information singular, plural ...
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