‖ xysterSurg.|ˈzɪstə(r)| [mod.L., a. Gr. ξυστήρ, f. ξύειν to scrape.] An instrument for scraping bones. [1684tr.Blancard's Phys.Dict.]1688Holme Armoury iii. 429/1 Raspatorium, Rasping hookes;..Scraping Instruments to shave and scrape filthy and scaly bones. Its called also Xyster.