A surgical instrument with a cylindrical saw usually used for removing a disk of bone, especially from the skull, or for removing corneal tissue.
tr.v.tre·phined, tre·phin·ing, tre·phines
To operate on with a trephine.
[French tréphine, from obsolete English trefine, from Latin trēs fīnēs, three ends : trēs, three; see trei- in Indo-European roots + fīnēs, pl. of fīnis, end.]
(Surgery) a surgical sawlike instrument for removing circular sections of bone, esp from the skull
vb
(Surgery) (tr) to remove a circular section of bone from (esp the skull)
Also called: trepan
[C17: from French tréphine, from obsolete English trefine trepan1, allegedly from Latin trēs fīnēs literally: three ends; influenced also by English trepane trepan1]
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