trephine(redirected from Treponema pallidum)
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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.]
treph′i·na′tion (trĕf′ə-nā′shən) n.
(Surgery) a surgical sawlike instrument for removing circular sections of bone, esp from the skull
vbAlso called: trepan
(Surgery) (tr) to remove a circular section of bone from (esp the skull)
[C17: from French tréphine, from obsolete English trefine trepan1, allegedly from Latin trēs fīnēs literally: three ends; influenced also by English trepane trepan1]
n., v. -phined, -phin•ing. n.
1. a small circular saw used in surgery to remove disks of bone, esp. from the skull.v.t.
2. to operate upon with a trephine.
[1620–30; sp. variant of trefine, orig. trafine, b. trapan (variant of trepan1) and Latin phrase trēs fīnēs three ends]
treph•i•na•tion (ˌtrɛf əˈneɪ ʃən) n.
Past participle: trephined
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|Noun||1.||trephine - a surgical instrument used to remove sections of bone from the skull|
surgical instrument - a medical instrument used in surgery
|Verb||1.||trephine - operate on with a trephine|