Entry 2 senses Webster, 1913 Prothesis · Proth·e·sis · IPA /ˈpɹɔθəsɪs/ 01 n. A credence table; -- so called by the Eastern or Greek Church. 1. A credence table; -- so called by the Eastern or Greek Church.(Eccl.) 2. See Prosthesis.(Med.) See: Prosthesis