Origin: Latin prefix ultra-
Ultraviolet has 4 different meanings across 2 categories:
radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays
"The sunscreen on my skin blocks most of the harmful ultraviolet radiation before it can damage my cells."
Ultraviolet colour.
"The artist added a touch of ultraviolet to her palette, creating a shimmer that seemed to glow even in dim light."
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"
of electromagnetic radiation beyond (higher in frequency than) light visible to the human eye; radiation with wavelengths from 380 nanometre - 10 nanometre
"The sunscreen on my skin is designed specifically to block harmful ultraviolet rays before they can damage my DNA."