osmium.
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.
Meaning & usage
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.
This reaction substitutes a ruthenium for an osmium.
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. An atom of this element.
Where this word comes from
Etymology tree Proto-Indo-European *h₃ed- Proto-Indo-European *-yeti Proto-Indo-European *h₃édyeti Proto-Hellenic *ód͏̌d͏̌ō Ancient Greek ὄζω (ózō) Ancient Greek -μή (-mḗ) Ancient Greek ὀσμή (osmḗ) Proto-Indo-European *-om Proto-Italic *-om Latin -umder. English -ium English osmium From Ancient Greek ὀσμή (osmḗ, “smell”) (because of the strong smell of its oxide) + -ium.
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Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.