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| yt·ter·bi·um [ i túrbee əm ] |
noun |
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| Definition: |
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rare metallic element: a soft silvery metal of the lanthanide group of rare-earth elements. Source: monazite, bastnaesite. Use: strengthening steel, in laser devices and portable X-ray units.
Symbol Yb
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| [Late 19th century. After Ytterby, a Swedish quarry] |
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 yt·ter·bic adjective |
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