单词	erbium
释义	erbium noun er·​bi·​um ˈər-bē-əm  : a metallic chemical element of the rare-earth group with atomic number 68 that is used especially in lasers, infrared light filters, and optical fibers see Chemical Elements Table Example Sentences Recent Examples on the Web Those nanoparticles contain two rare-earth elements, erbium and ytterbium, which help convert the infrared light into a higher energy green light that mammal eyes can detect. Courtney Linder, Popular Mechanics, 27 Aug. 2019 The beam excites the erbium atoms, which then add their energy to optical data signals passing through the fiber and boost the signals' power enough to carry them 50 miles or more before needing another boost. Josh Mchugh, WIRED, 1 Aug. 2001 Word History Etymology New Latin, from Ytterby, Sweden First Known Use 1843, in the meaning defined above Medical Definition erbium noun er·​bi·​um ˈər-bē-əm  : a metallic element of the rare-earth group that occurs with yttrium —symbol Er see Chemical Elements Table
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