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| i·rid·i·um [ i ríddee əm ] |
noun |
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| Definition: |
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silver-white metallic element: a brittle, corrosion-resistant, silver-white metallic element. Use: alloys for pen nibs, jewelry, watch and compass pivot bearings, surgical instruments, electrical contacts, chemical crucibles.
Symbol Ir
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| [Early 19th century. < Latin irid-, stem of iris "rainbow"] |
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