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the part of the electromagnetic spectrum with wavelengths shorter than light but longer than X-rays; in the range 0.4 × 10--6 and 1 × 10--8 metres
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


Pertaining to ultraviolet radiation. Abbreviated UV.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


(1) See ultraviolet light.

(2) A cloud-based storage locker for licensed content from the Digital Entertainment Content Ecosystem (see DECE). Under the Digital HD brand, purchases of Blu-ray discs with redeemable coupons and purchases of movies and TV shows (not rental) from participating online retailers entitles users to keep their content in the UltraViolet cloud and stream or download it as required.

Depending on the retailer's agreement, content might be sharable with friends and family, and parental access can be applied. A physical disc may also be obtainable. See Digital HD, Blu-ray Combo Pack and media locker.
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References in periodicals archive ?
They work by forming a chemical layer that absorbs ultraviolet rays before they reach the skin.
Ultraviolet rays from tanning beds can be five times as strong as the midday sun in summer.
According to the ozone-thinning theory, CFCs release chlorine into the stratosphere, the upper region of Earth's atmosphere, leading to ozone destruction and exposing the planet to harmful ultraviolet rays. Critics maintain that the chlorine in the atmosphere comes from natural sources such as volcanic eruptions and causes no permnent damage.
Without it we would be vulnerable to cancer-causing ultraviolet rays. Crops would also be destroyed.
Far above Earth's surface, some 35 to 80 kilometers high, lies the ozone layer, an oxygen blanket that shields life from hazardous ultraviolet rays. In recent years, the ozone layer has garnered attention because of its reported thinning, brought on by what scientists believe are the effects of chlorofluorocarbons and other industrial pollutants in the upper atmosphere.
Ultraviolet rays are penetrating lakes and streams, weakening the fish's immune systems.
In a series of experiments, they found that carbon exposed separately to ultraviolet rays or hydrogen yields a paltry red glow.
But British Antarctic Survey scientists believe the hole, which changes shape and exposes the tip of South America, the Falklands and New Zealand to the sun's cancer-causing ultraviolet rays, is near its peak size.
Researchers can measure such gases remotely with a spectrometer because sulfur dioxide blocks ultraviolet rays from the sun.
To earn the logo, clothing would have to offer at least factor-30 protection against ultraviolet rays.
Are people with XP, Cleaver wondered, somehow unable to repair the genetic damage caused by exposure to the sun's ultraviolet rays?
While ultraviolet rays are more evident in tourist hot spots such as Spain and Greece, Ireland's summer can also be potent.

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