MIOSIS Meaning of MIOSIS in English [ mʌɪ'əʊsɪs ](also myosis ) ■ noun excessive constriction of the pupil of the eye.Derivativesmiotic adjective OriginC19: from Gk muein 'shut the eyes' + -osis . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004