ultraviolet

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

• (Received Pronunciation, General American) IPA^(key): /ˌʌltɹəˈvaɪələt/, /ˌʌltɹəˈvaɪlət/

• Audio (Southern England):

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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^[1]:

     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.

ultraviolet (countable and uncountable, plural ultraviolets)

1. Ultraviolet colour.

• ultraviolet radiation

ultraviolet

1. ultraviolet

• “ultraviolet” in Den Danske Ordbog

From ultra- +‎ violet.

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

1. ultraviolet

ultraviolet m (plural ultraviolets)

1. ultraviolet (light)

• “ultraviolet”, in Trésor de la langue française informatisé [Digitized Treasury of the French Language], 2012.

Internationalism, from ultra- +‎ violet.

• (Standard Indonesian) IPA^(key): /ultraviˈɔlɛt/ [ul.t̪ra.fiˈɔ.lɛt̪̚]
• Syllabification: ul‧tra‧vi‧o‧let

ultraviolet

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

   Synonym: ultraungu

ultraviolet

1. ultraviolet (ultraviolet color)

   Synonym: ultraungu

• “ultraviolet” in Kamus Besar Bahasa Indonesia, Jakarta: Agency for Language Development and Cultivation – Ministry of Education, Culture, Research, and Technology of the Republic of Indonesia, 2016.

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

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

1. ultraviolet