Liberal Dictionary English Dictionary
adjective
- 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.
noun
- ultraviolet radiation.
noun
- 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
adjective
- of, relating to, or consisting of radiation lying in the ultravioletultraviolet radiation Abbreviation: UV
“beyond the violet end of the visible spectrum,” 1840, from ultra- + violet. Ultra-red (1870) was a former name for what now is called infra-red. adj.
- Of or relating to the range of invisible radiation wavelengths from about 4 nanometers, on the border of the x-ray region, to about 380 nanometers, just beyond the violet in the visible spectrum.
n.
- Ultraviolet light or the ultraviolet part of the spectrum.
Adjective
- Relating to electromagnetic radiation having frequencies higher than those of visible light but lower than those of x-rays, approximately 1015-1016 hertz. Some animals, such as bees, are capable of seeing ultraviolet radiation invisible to the human eye. See more at electromagnetic spectrum.
Noun
- Ultraviolet light or the ultraviolet part of the spectrum. See Note at infrared.