'Ultraviolet' definitions:
Definition of 'ultraviolet'
From: WordNet
adjective
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"
noun
Radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays [syn: ultraviolet, ultraviolet radiation, ultraviolet light, ultraviolet illumination, UV]
Definition of 'Ultraviolet'
From: 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]