Ultraviolet

2 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Ultraviolet \Ul`tra*vi"o*let\, a. [Pref. ultra- + violet.]
     (Physics)
     Lying outside the visible spectrum at its blue-violet end; --
     said of light more refrangible (i. e. having a shorter
     wavelength) than the extreme violet rays of the visible
     spectrum. Electromagnetic radiation with wavelengths shorter


     than those of ultrviolet light are not usually considered as
     light waves, but are classified differently. The ultraviolet
     region of the electromagnetic spectrum is generally
     considered as comprising those electromagnetic emissions with
     wavelengths lying between those of visible light and those of
     X-rays, i. e. between 4000 Angstroms and 100 Angstroms.
     [1913 Webster +PJC]

From WordNet (r) 2.0 [wn]:

  ultraviolet
       adj : 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"
       n : radiation lying in the ultraviolet range; wave lengths
           shorter than light but longer than X rays [syn: {ultraviolet
           radiation}, {ultraviolet light}, {ultraviolet
           illumination}, {UV}]