Trapan
31trephine — tre•phine [[t]trɪˈfaɪn, ˈfin[/t]] n. v. phined, phin•ing 1) srg a small circular saw used in surgery to remove disks of bone, esp. from the skull 2) srg to operate upon with a trephine • Etymology: 1620–30; sp. var. of trefine, orig. trafine, b.… …
32trepan — trepan1 [trē pan′, tripan′] n. [ME trepane < ML trepanum < Gr trypanon, carpenters tool, auger, trepan < trypan, to bore < IE * treup < base * ter , to bore, rub > THROW] 1. an early form of the trephine 2. a heavy boring tool… …
33tre|phine — «trih FYN, FEEN», noun, verb, phined, phin|ing. –n. a cylindrical saw with a removable center pin, used to cut out circular pieces from the skull. –v.t. to operate on with a trephine. ╂[earlier trafine, alteration of trapan, variant of trepan1;… …
