- 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.
Origin of ultraviolet
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for ultraviolet
This ultraviolet camera shows people what the sun is really doing to their skin.Muppet Beastie Boys, Robin Williams Tribute, and More Viral Videos
The Daily Beast Video
August 17, 2014
All of these instruments orbit Earth, beyond the atmosphere that blocks X-rays and most ultraviolet light.The Supermassive Black Hole Smokescreen
Matthew R. Francis
June 22, 2014
PhoneSoap disinfects your cell phone for $50 bucks with ultraviolet light in less than four minutes.We are Living in the Golden Age of the Most Narcissistic and Voyeuristic Tech Imaginable
Charles C. Johnson
January 18, 2014
UltraViolet is working to persuade Reebok to cut ties with Ross.
The rally was arranged by UltraViolet, an activist group against sexism.
As they sat down, he aimed his ultraviolet light-pencil at a serving robot.Space Viking
Henry Beam Piper
The right pan camera filters are mainly longer wavelength in the ultraviolet range.Color Images from Mars Rovers
Wounds are treated effectively and water is sterilized by the ultraviolet radiant energy in modern artificial illuminants.
The ultraviolet rays falling upon this screen were transformed into visible rays by the phenomenon of fluorescence.
In most of the vats vegetation grew in various stages, greening under the ultraviolet rays that radiated from the low roof.Rebels of the Red Planet
Charles Louis Fontenay
- 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 ultravioletultraviolet radiation Abbreviation: UV
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for ultraviolet
Online Etymology Dictionary, © 2010 Douglas Harper
- 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.
- Ultraviolet light or the ultraviolet part of the spectrum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- 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.
- Ultraviolet light or the ultraviolet part of the spectrum. See Note at infrared.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.