- beyond the violet in the spectrum, corresponding to light having wavelengths shorter than 4000 angstrom units.
- pertaining to, producing, or utilizing light having such wavelengths: an ultraviolet lamp.
- ultraviolet radiation.
- the part of the electromagnetic spectrum with wavelengths shorter than light but longer than X-rays; in the range 0.4 × 10 –6 and 1 × 10 –8 metres
- of, relating to, or consisting of radiation lying in the ultraviolet
