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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


Pertaining to ultraviolet radiation. Abbreviated UV.


(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.
References in periodicals archive ?
As a result, people in the South get more natural ultraviolet ray exposure.
Viewing the eclipse through a telescope can also damage the retina, as Galileo himself learned, because the device magnifies the sun's harmful ultraviolet rays.
Data show hairless mice taking the hyaluronic acid orally for 6 weeks significantly suppressed the decrease of skin moisture and resultant formation of wrinkles under ultraviolet rays.
The sun has ultraviolet rays A, B, and C that can be harmful to the eye.
Marketers of the Foster Grant brand say the danger posed by ultraviolet rays in the winter is higher than in the summer.
Antioxidants - which help protect body cells - in red wine and similarly-coloured fruit and veg act as a "first line of defence" against damaging ultraviolet rays, said the study by German and Israeli scientists.
Abdel-Malek and colleagues found that when a pigmentation gene called the "melanocortin 1 receptor" or MC1R does not function properly, skin cells do not respond to a hormone, called a-MSH, which causes cells to produce dark pigmentation to protect themselves from ultraviolet rays.
Summary: The sun gives light, warmth and energy but along with those benefits come invisible ultraviolet rays that are harmful to the skin.
Even sitting under an umbrella is not the answer, as it still allows 40 per cent of ultraviolet rays to pass through, said Nicosia dermatologist Dr Constantinos Demetriou.
The thin film device could be worn as a wrist band to warn wearers they risk receiving a potentially harmful dose of ultraviolet rays.
The earth's diminishing ozone layer, which filters out less UV light, makes humans more susceptible to ultraviolet rays.
Exposure to the sun's ultraviolet rays damages skin - that's unavoidable, and the reason why fair skin changes colour to give a tan as the pigment melanin is laid down to protect the vulnerable deeper layers.

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