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| actinic |
of or pertaining to the chemical property of ultraviolet radiation and x-rays that produces photochemical effects. |
| actinic rays |
electromagnetic radiation, such as x-rays or ultraviolet light, that can produce an image on a photographic emulsion. |
| black light |
ultraviolet or infrared radiation that is invisible but indirectly detectable, as by fluorescence. |
| fluorescence |
the giving off of electromagnetic radiation, esp. in the form of visible light, during or after exposure to radiation from another source such as ultraviolet light or x-rays. [1/2 definitions] |
| ozone |
oxygen in the form of molecules with three atoms, created by exposure of oxygen to electrical discharge or ultraviolet radiation, having a sharp smell, and being an effective oxidant for use in bleaching and sterilizing. |
| ozone layer |
an atmospheric layer between ten and twenty miles above the earth that contains a substantial concentration of ozone, which absorbs ultraviolet radiation from space and prevents some heat loss from the earth; ozonosphere. |
| physical therapy |
the treatment of disease and injury by physical and mechanical means, such as exercise, heat, ultraviolet or infrared light, hydrotherapy, or massage, rather than by drugs; physiotherapy. |
| quartz lamp |
a mercury-vapor lamp, enclosed within transparent quartz, that emits ultraviolet rays when an electric current is passed through it. |
| sunlamp |
a lamp that produces ultraviolet light, used to get a suntan and in therapeutic treatments. |
| tanning bed |
an enclosed chamber in which one tans one's skin by lying on a transparent surface bathed in ultraviolet light rays. |
| ultraviolet |
light with a wavelength in the ultraviolet range. (Cf. infrared.) [1/3 definitions] |
| UV |
abbreviation of "ultraviolet." |
| violet ray |
an ultraviolet ray. [1/2 definitions] |
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