单词	ultraviolet
释义	ultraviolet adjective ul·​tra·​vi·​o·​let ˌəl-trə-ˈvī-(ə-)lət  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 Example Sentences Recent Examples on the Web My research on the evolution of human skin pigmentation has shown that the skin color of people in prehistory was tuned to local environmental conditions, primarily to local levels of ultraviolet light. Nina G. Jablonski, The Conversation, 6 Sep. 2022 When the dust clouds from each star collide, it is heated by the ultraviolet light from the two stars. Joshua Hawkins, BGR, 2 Sep. 2022 With his indoor-pool projects, the water is typically treated with ultraviolet light and a small amount of chlorine. Beth Decarbo, BostonGlobe.com, 31 Aug. 2022 In the final step, the water is disinfected using ultraviolet light. Rachel Pannett, Washington Post, 29 Aug. 2022 Lithography tools project ultraviolet light onto photosensitive material on silicon wafers to create a pattern. oregonlive, 17 Aug. 2022 According to a government website, various types of robots can spout disinfectant mist into the air, shine germ-killing ultraviolet light and, in some cases, detect people who are not wearing masks and ask them to put one on. Los Angeles Times, 19 Feb. 2022 The surrounding dust grains absorb the ultraviolet light and reemit it in the infrared. Aaron S. Evans, Scientific American, 1 Dec. 2021 Because albino gators lack defense from the sun’s ultraviolet light, Wild Florida has designed a high-shade habitat to minimize exposure to damaging rays, reports Ed Brown for Newsweek. Corryn Wetzel, Smithsonian Magazine, 20 Aug. 2021 See More Word History First Known Use 1840, in the meaning defined at sense 1 Phrases Containing ultraviolet far-ultraviolet near-ultraviolet far-ultraviolet near-ultraviolet Kids Definition ultraviolet adjective ul·​tra·​vi·​o·​let ˌəl-trə-ˈvī-ə-lət  : 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 Medical Definition ultraviolet 1 of 2 adjective ul·​tra·​vi·​o·​let ˌəl-trə-ˈvī-(ə-)lət  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 2 of 2 noun : ultraviolet radiation
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