Ultraviolet
WordNet
adjective
(1) 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
(2) Radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
WiktionaryText
Adjective
- of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre