Main Entry: an·ti·mo·ny

Pronunciation: \ˈan-tə-ˌmō-nē\

Function: noun

Etymology: Middle English antimonie, from Medieval Latin antimonium

Date: 15th century

1 : stibnite
2 : a trivalent and pentavalent metalloid element that is commonly metallic silvery white, crystalline, and brittle and that is used especially in alloys, semiconductors, and flame-retardant substances — see element table