osmium
/ˈɑzmiəm/
noun
- A hard, dense, bluish-white metallic element, the densest naturally occurring metal, used in alloys and as a catalyst.
- Osmium is so dense that a small cube of it weighs more than a brick.
- The periodic table lists osmium with the symbol Os and atomic number 76.
- Scientists use osmium to make very hard alloys for electrical contacts.