Definitions for ultraviolet
ˌʌl trəˈvaɪ ə lɪtul·tra·vi·o·let

Princeton's WordNetRate this definition:4.2 / 6 votes

1. ultraviolet, ultraviolet radiation, ultraviolet light, ultraviolet illumination, UVadjective

   radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays

2. ultravioletadjective

   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"

WiktionaryRate this definition:1.0 / 1 vote

1. ultravioletnoun

   Ultraviolet colour.

2. ultravioletadjective

   of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre

WikipediaRate this definition:0.0 / 0 votes

1. Ultraviolet

   Ultraviolet (UV) is a form of electromagnetic radiation with wavelength from 10 nm (with a corresponding frequency around 30 PHz) to 400 nm (750 THz), 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. It is also produced by electric arcs, Cherenkov radiation, and specialized lights, such as mercury-vapor lamps, tanning lamps, and black lights. Although long-wavelength ultraviolet is not considered an ionizing radiation because its photons lack the energy to ionize atoms, it can cause chemical reactions and causes many substances to glow or fluoresce. Many practical applications, including chemical and biological effects, derive from the way that UV radiation can interact with organic molecules. These interactions can involve absorption or adjusting energy states in molecules, but do not necessarily involve heating.Short-wave ultraviolet light damages DNA and sterilizes surfaces with which it comes into contact. For humans, suntan and sunburn are familiar effects of exposure of the skin to UV light, along with an increased risk of skin cancer. The amount of UV light produced by the Sun means that the Earth would not be able to sustain life on dry land if most of that light were not filtered out by the atmosphere. More energetic, shorter-wavelength "extreme" UV below 121 nm ionizes air so strongly that it is absorbed before it reaches the ground. However, ultraviolet light (specifically, UVB) is also responsible for the formation of vitamin D in most land vertebrates, including humans. The UV spectrum, thus, has effects both beneficial and harmful to life. The lower wavelength limit of human vision is conventionally taken as 400 nm, so ultraviolet rays are invisible to humans, although people can sometimes perceive light at shorter wavelengths than this. Insects, birds, and some mammals can see near-UV (NUV) (i.e., slightly shorter wavelengths than what humans can see).

ChatGPTRate this definition:0.0 / 0 votes

1. ultraviolet

   Ultraviolet (UV) refers to the electromagnetic radiation with wavelengths shorter than visible light but longer than X-rays, in the range of 10 nanometers to 400 nanometers. It is so named because the spectrum consists of electromagnetic waves with frequencies higher than those humans identify as violet light. It is not visible to the human eye but can cause physiological effects such as sunburn.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Ultravioletadjective

   lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum

WikidataRate this definition:3.9 / 7 votes

1. Ultraviolet

   Ultraviolet light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than X-rays, that is, in the range between 400 nm and 10 nm, corresponding to photon energies from 3 eV to 124 eV. It is so-named because the spectrum consists of electromagnetic waves with frequencies higher than those that humans identify as the color violet. These frequencies are invisible to humans, but visible to a number of insects and birds. UV light is found in sunlight and is emitted by electric arcs and specialized lights such as mercury lamps and black lights. It can cause chemical reactions, and causes many substances to glow or fluoresce. A large fraction of UV, including all that reaches the surface of the Earth, is classified as non-ionizing radiation. The higher energies of the ultraviolet spectrum from wavelengths about 10 nm to 120 nm are ionizing, but due to this effect, these wavelengths are absorbed by nitrogen and even more strongly by dioxygen, and thus have an extremely short path length through air. However, the entire spectrum of ultraviolet radiation has some of the biological features of ionizing radiation, in doing far more damage to many molecules in biological systems than is accounted for by simple heating effects. These properties derive from the ultraviolet photon's power to alter chemical bonds in molecules, even without having enough energy to ionize atoms.

How to pronounce ultraviolet?

1. Alex

   US English

   David

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   Mark

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   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

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   Neerja

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   Zira

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   Oliver

   British

   Wendy

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   Fred

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   Tessa

   South African

How to say ultraviolet in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of ultraviolet in Chaldean Numerology is: 6

2. Pythagorean Numerology

   The numerical value of ultraviolet in Pythagorean Numerology is: 2

Examples of ultraviolet in a Sentence

1. Donald Trump:

   Supposing we hit the body with a tremendous, whether it's ultraviolet or just very powerful, light.

2. David Swayne:

   As we get into spring and summer, sunshine comes and ultraviolet light will kill influenza virus.

3. Adam Friedman:

   Since UV [ ultraviolet ] light is a carcinogen, now there's no reason to put one at risk for skin cancer, skin aging and even immune suppression.

4. Meredith MacGregor:

   Proxima Centauri b went from normal to 14,000 times brighter when seen in ultraviolet wavelengths over the span of a few seconds.

5. Caroline Kurtz:

   JTACs — they’re only going to use it for writing, so red lights are going to be best for them because they don’t want it to interfere with their night vision, but let’ssay the PJs,on the other hand — maybe they want one that has ultraviolet light so that blood is now visible, or maybe they want one with infrared so that they could signal to each other. So there are all these different options on the light spectrum that we can play on depending on the mission.

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References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=ultraviolet
2. ^ Wiktionary
   https://en.wiktionary.org/wiki/Ultraviolet
3. ^ Wikipedia
   https://en.wikipedia.org/wiki/Ultraviolet
4. ^ ChatGPT
   https://chat.openai.com
5. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/ultraviolet
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=ultraviolet