ANORTHITE Meaning of ANORTHITE in English [ ə'nɔ:θʌɪt ]■ noun a calcium-rich mineral of the feldspar group, typically white.OriginC19: from an- 1 + Gk orthos 'straight' + -ite 1 . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004