# osmium

> English word · Noun · IPA /ˈɒz.mi.əm/ · frequency rank #89,714

## Definitions
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.
2. A single atom of this element.

## Etymology
From Ancient Greek ὀσμή (osmḗ, “smell”) (because of the strong smell of its oxide) + -ium.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/osmium