PROPTOSIS Meaning of PROPTOSIS in English [ prɒp'təʊsɪs ]■ noun Medicine protrusion or displacement of an eye or other body participleOriginC17: via late L. from Gk proptōsis , from pro 'before' + piptein 'to fall'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004