PROTHESIS Meaning of PROTHESIS in English proth|esis BrE AmE ˈprɒθ |əs ɪs -ɪs-, § -əs AmE ˈprɑːθ-▷ proth|eses ə siːz ɪ- Longman Pronunciation English Dictionary. Английский словарь произношений Longman. 2012