Open English Wordnet
Nouns
(n)ultraviolet, ultraviolet radiation, ultraviolet light, ultraviolet illumination, UVradiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
Adjectives
(s)ultraviolethaving 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”