ultraviolet(n = noun.phenomenon) ultraviolet illumination, ultraviolet light, ultraviolet radiation, uv - radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays;
is a kind of actinic radiation, actinic ray
has particulars: sun-ray, sunray
Derived form adjective ultraviolet1
ultraviolet(s = adj.all) - 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"
Derived form noun ultraviolet1
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]
ultraviolet, adj. Physics 1 having a wavelength (just) beyond the violet end of the visible spectrum.
2 of or using such radiation.
N purple, blue and red, bishop's purple, aniline dyes, gridelin, amethyst, purpure, heliotrope, lividness, lividity, purple, violet, ultraviolet, plum-colored, lavender, lilac, puce, mauve, livid.
ultraviolet illumination, ultraviolet lamp, ultraviolet light, ultraviolet radiation, ultraviolet ray, ultraviolet source, ultraviolet spectrum