Use the adjective ultraviolet to describe light with a wavelength that's less than visible light, but longer than x rays. You can't see ultraviolet light.
Lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum.
Noun
radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
Adjective S.
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"
a.
Lying outside the visible spectrum at its violet end;
-- said of rays more refrangible than the extreme violet rays of the
spectrum.
Ultraviolet
Lying outside the visible spectrum at its violet end; -- said of rays more refrangible than the extreme violet rays of the spectrum.
Usage Examples
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