ultraviolet

adjective
ul·​tra·​vi·​o·​let | \ ˌəl-trə-ˈvī-(ə-)lət How to pronounce ultraviolet (audio) \

Definition of ultraviolet

1 : situated beyond the visible spectrum at its violet end used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2 : relating to, producing, or employing ultraviolet radiation

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Other Words from ultraviolet

ultraviolet noun

Examples of ultraviolet in a Sentence

Recent Examples on the Web

This region of the solar system contains the ideal mix of ultraviolet light and chemical reactions to usher in early life. Saqib Shah, Fox News, "Mysterious 'Super Earth' planet 'most likely' candidate to host life - but there's a huge problem," 3 Aug. 2018 Inside that cloud, the gas interacts with ultraviolet light from the Sun and becomes ionized. Avery Thompson, Popular Mechanics, "Why Is the 'Christmas Comet' Green?," 18 Dec. 2018 Its Aladin instrument includes a laser that generates pulses of ultraviolet light, which are beamed down into the atmosphere to profile the world's winds. Eric Berger, Ars Technica, "Rocket Report: China aims for the Moon, SpaceX gets approval for load-and-go," 17 Aug. 2018 According to Mayo Clinic, basal cell carcinoma is a type of skin cancer that is thought to be caused by long-term exposure to ultraviolet radiation from sunlight. Temi Adebowale, Good Housekeeping, "Melanie Griffith Makes Plea to Fans After Revealing "Final Stage" to Remove Skin Cancer," 27 Aug. 2018 The orbiter’s main spectrometer, NOMAD, operates in the infrared, ultraviolet and visible parts of the electromagnetic spectrum. Nisha Gaind, Scientific American, "Mars Probe Poised to Solve Red Planet’s Methane Mystery," 26 Apr. 2018 The key components to this new method of detection are an ordinary smartphone, some special software downloaded onto the phone, a box made from Lego bricks, ultraviolet light, a standard 96-well test plate– and a special sauce, so to speak. Allison Barrie, Fox News, "Innovative project harnesses Legos and smartphones in the fight against invisible, deadly weapons," 13 July 2018 Free radicals are created by environmental pollutants and ultraviolet radiation. Talia Abbas, SELF, "I Had a Dermatologist Critique My Skin-Care Routine—and Here's What I'm Changing," 20 June 2018 Methane is also quickly broken down by ultraviolet radiation, so any of the gas discovered on Mars was probably released recently. Adam Mann, Scientific American, "Curiosity Rover Uncovers Long-Sought Organic Materials on Martian Surface," 7 June 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'ultraviolet.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of ultraviolet

1840, in the meaning defined at sense 1

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Statistics for ultraviolet

Last Updated

12 Apr 2019

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Time Traveler for ultraviolet

The first known use of ultraviolet was in 1840

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More Definitions for ultraviolet

ultraviolet

adjective

English Language Learners Definition of ultraviolet

technical used to describe rays of light that cannot be seen and that are slightly shorter than the rays of violet light

ultraviolet

adjective
ul·​tra·​vi·​o·​let | \ ˌəl-trə-ˈvī-ə-lət How to pronounce ultraviolet (audio) \

Kids Definition of ultraviolet

: relating to, producing, or being energy that is like light but has a slightly shorter wavelength and lies beyond the violet end of the spectrum

ultraviolet

adjective
ul·​tra·​vi·​o·​let | \ ˌəl-trə-ˈvī-(ə-)lət How to pronounce ultraviolet (audio) \

Medical Definition of ultraviolet

 (Entry 1 of 2)

1 : situated beyond the visible spectrum at its violet end used of radiation having a wavelength shorter than wavelengths of visible light and longer than those of X-rays
2 : relating to, producing, or employing ultraviolet radiation

ultraviolet

noun

Medical Definition of ultraviolet (Entry 2 of 2)

: ultraviolet radiation

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More from Merriam-Webster on ultraviolet

Rhyming Dictionary: Words that rhyme with ultraviolet

Spanish Central: Translation of ultraviolet

Nglish: Translation of ultraviolet for Spanish Speakers

Comments on ultraviolet

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