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| se·le·ni·um [ sə lnee əm ] |
noun |
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| Definition: |
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nonmetallic element: a nonmetallic element that occurs in several forms ranging from a red powder to gray black crystals and is an essential trace element, although toxic in excess. Source: copper refining. Use: photocells, photocopiers.
Symbol Se
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| [Early 19th century. < modern Latin< Greek selēnē "moon" < selas "light"] |
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