ˈantə̇ˌmōnē, ˈaan-, -ni, US also & Brit usually -_mən- noun
( -es )
Etymology: Middle English antimonie, from Medieval Latin antimonium, perhaps modification of Arabic ithmid, of Hamitic origin; akin to Egyptian sdm antimony, Coptic stēm
1. : stibnite
2. : a trivalent and pentavalent metalloid element that is commonly metallic silvery white, crystalline, and brittle yet rather soft but is known also in black amorphous, unstable yellow, and explosive forms, that occurs in the free state but more often combined in minerals (as stibnite, kermesite, valentinite, and cervantite) and in ores of other metals (as lead), that is prepared chiefly from stibnite usually by roasting and smelting, and that is used especially as a constituent of alloys (as antimonial lead, type metals, and bearing metals) — symbol Sb ; see element table