STIBNITE Meaning of STIBNITE in English [ 'stɪbnʌɪt ]■ noun a lead-grey mineral consisting of antimony sulphide.OriginC19: from L. stibium 'black antimony' + -ine 4 + -ite 1 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004