a type of small crown saw used in surgery to remove a circular section, as of bone from the skull
Origin of trephineearlier trafine, form based on trepan ; from Classical Latin tres, three + fines, ends
to operate on with a trephine
A surgical instrument with a cylindrical saw usually used for removing a disk of bone, especially from the skull, or for removing corneal tissue.
transitive verbtre·phined, tre·phin·ing, tre·phines
To operate on with a trephine.
Origin of trephineFrench tréphine, from obsolete English trefine, from Latin tr&emacron;s f&imacron;n&emacron;s, three ends : tr&emacron;s, three; see trei- in Indo-European roots + f&imacron;n&emacron;s, pl. of f&imacron;nis, end.
(third-person singular simple present trephines, present participle trephining, simple past and past participle trephined)
- To use a trephine during surgery.