osmium
UK /ˈɒz.mi.əm/ US /ˈɑz.mi.əm/
noun 2
Definitions
noun
1
A chemical element (symbol Os) with atomic number 76: a hard, brittle, heavy, bluish-white transition metal found as a trace element in alloys, mostly in platinum ores.
Their latest catalyst includes some osmium.
2
A single atom of this element.
This reaction substitutes a ruthenium for an osmium.
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