stibnitePronunciation: /ˈstɪbnʌɪt/Definition of stibnite noun [mass noun] a lead-grey mineral, typically occurring as striated prismatic crystals, which consists of antimony sulphide and is the chief ore of antimony. Origin: mid 19th century: from Latin stibium 'black antimony' + -ine4 + -ite1stibnite in other Oxford dictionaries Definition of stibnite in the US English dictionary
