ultraviolet C radiation

Pronunciation

Definition 1

Invisible rays that are part of the energy that comes from the sun. Most ultraviolet C radiation from the sun is blocked from the Earth’s surface by the ozone layer. In medicine, ultraviolet C radiation may also come from special lamps or a laser and is used to kill germs or to help heal wounds. It is also used to treat certain skin conditions such as psoriasis, vitiligo, and skin nodules of cutaneous T-cell lymphoma Also called UVC radiation. (NCI Dictionary)

Definition 2

Many scientists rate wavelengths in the C range of the ultraviolet (UVC) solar spectrum, between 200 and 290 nm, as the most carcinogenic. The ozone layer absorbs most UVC rays. Recent ozone depletion has permitted more UV radiation to reach the Earth's surface with a wide range of potentially damaging health effects related to skin, eyes, and immune system. (NCI Thesaurus)

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