- a small circular saw with a center pin mounted on a strong hollow metal shaft to which is attached a transverse handle: used in surgery to remove circular disks of bone from the skull.
- to operate upon with a trephine.
Origin of trephine
1620–30; spelling variant of trefine, orig. trafine, blend of trapan (variant of trepan1) and Latin phrase trēs fīnēs three ends (the inventor's explanation)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- a surgical sawlike instrument for removing circular sections of bone, esp from the skull
- (tr) to remove a circular section of bone from (esp the skull)
Also called: trepan
C17: from French tréphine, from obsolete English trefine trepan 1, allegedly from Latin trēs fīnēs literally: three ends; influenced also by English trepane trepan 1
Word Origin and History for trephination
1874, from trephine (v.), 1804, from trephine (n.), 1620s, said to be from Latin tres fines "three ends," with form apparently influenced by trepan. Related: Trephining.
Online Etymology Dictionary, © 2010 Douglas Harper
- Removal of a circular piece of bone, especially of the skull, by a trephine.trepanation
- A cylindrical or crown saw for the removal of a disk of bone, especially from the skull, or removal of other firm tissue such as that of the cornea.
- To operate on with a trephine.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.