1) Describing certain rays 2) Fictional vampire hunter 3) Internet-based activism 4) Invisible 5) Kind of light 6) Unseeable 7) Vampire in television
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https://www.crosswordclues.com/clue/ultraviolet
1) Invisible 2) Unseeable 3) Uv
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https://www.crosswordclues.com/clue/ultraviolet
• (a.) Lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum.
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http://thinkexist.com/dictionary/meaning/ultraviolet/
Electromagnetic radiation that has a wavelength shorter than visible light and longer than x-rays. Although it accounts for only 4 to 5 percent of the total energy of insolation, it is responsible for many complex photochemical reactions, such as fluorescence and the formation of ozone.
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http://www.avon-weather.com/glossary.html
A band of electromagnetic radiation with a higher frequency and shorter wavelength than visible blue light. Ultraviolet astronomy is generally performed in space, since Earth's atmosphere absorbs most ultraviolet radiation.
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http://www.braeunig.us/space/glossary.htm
Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.
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http://www.daviddarling.info/encyclopedia/U/AE_ultraviolet.html
Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.
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http://www.electromn.com/glossary/u.htm
Electromagnetic radiation at wavelengths shorter than the violet end of visible light; the atmosphere of the Earth effectively blocks the transmission of most ultraviolet light.
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http://www.encyclo.co.uk/local/20040
Electromagnetic radiation with a wavelength shorter than visible light but longer than X-rays.
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http://www.encyclo.co.uk/local/20448
The invisible rays of the spectrum of light which are at its violet end. Sometimes abbreviated U.V.
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http://www.encyclo.co.uk/local/20933
<physics> Continuous spectrum beyond the violet end of the visible spectrum (wavelength less than 400nm) and above the X-ray wavelengths (greater than 5 nm). ... Glass absorbs UV, so optical systems at these wavelengths have to be of quartz. Nucleic acids absorb UV most strongly at around 260nm and this is the wavelength most likely to cause ...
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http://www.encyclo.co.uk/local/20973
(ul″trә-vi´ә-lәt) denoting electromagnetic radiation of wavelength shorter than that of the violet end of the spectrum, having wavelengths of 4–400 nanometers. ultraviolet A(UVA) ultraviolet radiation with wavelengths between 320 and 4...
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http://www.encyclo.co.uk/local/21001
Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.
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http://www.encyclo.co.uk/local/21690
Electromagnetic waves with wavelengths around 100 to 400mm.
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http://www.encyclo.co.uk/visitor-contributions.php
Continuous spectrum beyond the violet end of the visible spectrum (wavelength less than 400nm), and above the X-ray wavelengths (greater than 5nm). Glass absorbs UV, so optical systems at these wavelengths have to be made of quartz. Nucleic acids absorb UV most strongly at around 260nm, and this is the wavelength most likely to cause mutational damage (by the formation of thymine dimers). It is the UV component of sunlight that causes actinic keratoses to form in skin, but that is also required for Vitamin D synthesis.
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http://www.encyclo.co.uk/visitor-contributions.php
(UV, uv) Type: Term Pronunciation: ŭl′tră-vī′ō-let Definitions: 1. Denoting electromagnetic rays at higher frequency than the violet end of the visible spectrum.
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http://www.medilexicon.com/medicaldictionary.php?t=95532
Electromagnetic radiation at wavelengths shorter than the violet end of visible light. The atmosphere of the Earth effectively blocks the transmission of most ultraviolet light, which can be deadly to many forms of life.
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http://www.seasky.org/astronomy/astronomy-glossary.html
A part of the electromagnetic spectrum, with a higher frequency than blue light, but lower than X-Rays.
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http://www.solarspace.co.uk/Glossary4.php
Electromagnetic radiation at wavelengths shorter than the violet end of visible light; the atmosphere of the Earth effectively blocks the transmission of most ultraviolet light.
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http://www.solarviews.com/eng/terms.htm
Light that is so blue humans cannot see it. A band of the electromagnetic spectrum between the visible and the X-ray. Photons of ultraviolet light are more energetic than photons of visible light.
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https://www.encyclo.co.uk/local/20037
(UVA,UVB) Ultraviolet light is light that we cannot see. But it is an important part of sunlight. Ultraviolet light is divided into UVA, UVB and UVC. UVC cannot get through the ozone layer to reach us. But UVA and UVB can both increase the risk of skin cancer, including malignant melanoma. Sunbathing and using sun beds increases your skin's exposur...
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https://www.encyclo.co.uk/local/20753
adjective 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`
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https://www.encyclo.co.uk/local/20974
(UV) (or Ultraviolet Radiation)Ultraviolet radiation from the sun plays a role in the formation of the ozone layer by acting as a catalyst for a chemical reaction that breaks apart oxygen molecules which then recombine to form ozone. The absorption of UV by stratospheric ozone and atmospheric oxygen prevents very little ultraviolet radiation to rea...
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https://www.encyclo.co.uk/local/21182
Electromagnetic radiation in the wavelength range of 4 to 400 nanometers.
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https://www.encyclo.co.uk/local/22819
beyond the violet in the spectrum, corresponding to light having wavelengths shorter than 4000 angstrom units. · pertaining to, producing, or utilizing light having such wavelengths:Cf. an ultraviolet lamp.
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https://www.infoplease.com/dictionary/ultraviolet
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