antimony

Etymology

From Medieval Latin antimonium attested in the 11th century; see also the Wikipedia section.

noun

1. A chemical element (symbol Sb, from Latin stibium) with an atomic number of 51: a lustrous gray metalloid.
   Deep in the Salmon River Mountains, an Idaho mining company, Perpetua Resources, is proposing a vast open-pit gold mine that would also produce 115 million pounds of antimony — an element that may be critical to manufacturing the high-capacity liquid-metal batteries of the future. 2021-12-27, Jack Healy, Mike Baker, “As Miners Chase Clean-Energy Minerals, Tribes Fear a Repeat of the Past”, in The New York Times, →ISSN
2. The alloy stibnite.
   In quality synergistic additives in a composition use oxide antimonies. 2005, Al Berlin, Chemical Physics of Pyrolysis, Combustion, and Oxidation, page 21