ANHYDRITE Meaning of ANHYDRITE in English [ an'hʌɪdrʌɪt ]■ noun a white mineral consisting of anhydrous calcium sulphate.OriginC19: from Gk anudros (see anhydrous ) + -ite 1 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004