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osmium

noun
/ˈɒzmiəm/
/ˈɑːzmiəm/
[uncountable]
(symbol Os)
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  1. a chemical element. Osmium is a hard silver-white metal.
    Word Originearly 19th cent.: modern Latin, from Greek osmē ‘smell’ (from the pungent smell of its tetroxide).

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