Services. A steroid hormone produced in the skin when exposed to ultraviolet light or obtained from dietary sources. UV light can be broken down into five different types based on their wavelengths, including vacuum UV (40-190 nm), far UV (190-220 nm), UVC (220-290 nm), UVB (290-320 nm), and UVA (320-400 nm). The noun ULTRAVIOLET LIGHT has 1 sense: 1. radiation lying in the ultraviolet range; wave lengths shorter than light but longer than X rays. Log in or sign up to add this lesson to a Custom Course. Dictionary.com Unabridged What is Visible Light? Get the unbiased info you need to find the right school. Other electromagnetic waves include radio waves, microwaves, visible light, and X-rays. UVA is the most commonly encountered type of UV light and also the least harmful. Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. However, UVB and UVA rays do penetrate the ozone layer. In the "X" circuit, the negative was grounded along an ultraviolet beam from the ship's repeller-ray generator. AudioEnglish Definitions... Just One Click Away! Please tell us where you read or heard it (including the quote, if possible). However, overexposure to UV light can cause sunburn, cataracts, and eventually lead to the development of skin cancer. Anyone can earn This is used in crime scene analysis as well as to check for sanitation of bathrooms and other public spaces where these fluids may be present but invisible to the naked eye. Thesaurus: synonyms and related words Light of this type causes the skin to become darker in the sun. A portion of the light spectrum not visible to the eye. UV light damages DNA, and therefore, has the ability to kill bacteria and viruses. used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays, Nguyen’s team created a free-flying robot that uses, Every day at Sharp Grossmont Hospital, custodial teams wheel two boxy robots down the halls from one patient room to the next, using, That includes statements about the possible value of treating COVID-19 patients with, Post the Definition of ultraviolet to Facebook, Share the Definition of ultraviolet on Twitter, used to describe rays of light that cannot be seen and that are slightly shorter than the rays of violet light. Hyponyms (each of the following is a kind of "ultraviolet light"): sun-ray; sunray (a ray of artificial ultraviolet light from a sunray lamp). Log in here for access. An example of something ultraviolet is "ultraviolet light" an electromagnetic radiation with a wavelength of up to 400 nanometers. UVB is typically the most destructive form of UV radiation because it has enough energy to damage cellular DNA yet not enough to be completely absorbed by the atmosphere. Q. what does a sun block cream do? 4 Reading Comprehension Activities Your Students Will Enjoy, Process Priorities in Linux: Definition & Modification, What Is a Cubic Centimeter? Get unrestricted access to all the English-Learning Units! Send us feedback. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. The UV spectrum is divided into vacuum UV (40-190 nm), far UV (190-220 nm), UVC (220-290 nm), UVB (290-320 nm), and UVA (320-400 nm). and career path that can help you find the school that's right for you. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition 's' : ''}}. Can you spell these 10 commonly misspelled words? UV lighting is a special type of radiation that can’t be seen by the naked eye because it’s part of the invisible section that makes up the electromagnetic spectrum.
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