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osmium

os·mi·um

osmium

 
pronunciation:
az mi m
features:
Word Combinations (noun)
part of speech: noun
definition: a chemical element that has seventy-six protons in each nucleus and that occurs as an octavalent ion or in pure form as an extremely hard, dense, brittle bluish metal solid used as a catalyst and esp. in alloys and in electron microscopy because of its extremely high density. (symbol: Os)
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