n.
Pronunciation: ' an-t ə - ˌ m ō -n ē
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