Английский разговорный словарь (основной) - trephine
Trephine
trephine
trɪˈfi:n n. & v. --n. an improved form of trepanwith a guiding centre-pin. --v.tr. operate on with this. øøtrephination n. [orig. trafine, f. L tres fines three ends, app. formed after TREPAN]