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trephine

 [trĕ-f€īn´, trĕ-fēn´]
1. a saw for removing a disk of bone, chiefly from the skull.
Trephine. From Dorland's, 2000.
2. an instrument for removing a circular area of cornea.
3. to remove with this instrument.

trepan

(trĭ-păn′)
n.
1. A rock-boring tool used in mining for sinking shafts.
2. Medicine A trephine.
tr.v. tre·panned, tre·panning, tre·pans
1. To bore (a shaft) with a trepan.
2. To bore or otherwise make a hole in (the skull), as in certain prehistoric cultures or in surgery using a trephine.

trep′a·na′tion (trĕp′ə-nā′shən) n.

trepan

See trephine.

tre·phine

, trepan (trē-fīn', trĕ-pan')
1. A cylindric or crown saw used for the removal of a disc of bone, especially from the skull, or of other firm tissue as that of the cornea.
2. To remove a disc of bone or other tissue by means of a trephine.
[contrived fr. L. tres fines, three ends]

tre·phine

, trepan (trē-fīn', trĕ-pan')
1. A cylindric or crown saw used for the removal of a disc of bone, especially from the skull, or of other firm tissue.
2. To remove a disc of bone or other tissue by means of a trephine.
[contrived fr. L. tres fines, three ends]

trepan

trephine.
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References in periodicals archive ?
Trepanning produces far fewer chips that have to be managed, and thus tends to be far less problematic when cutting.
Tenders are invited for Trepanning Tool And Guide For Drilling 6 Inch Dia Riser Hole As Per Drawing No.
They found he had had a form of surgery known as trepanning.
Simonds Hole Cutters are trepanning, or broaching cutters for a variety of cutting applications, and are constructed of M2 high-speed steel and designed for use on magnetic drill bases, drill presses, and milling machines.
Utilizing American Heller's trepanning technology, a trepanning cutter for the hoist drum was designed and produced for the procedure.
Watched by a film crew, she had injected local anaesthetic into the crown of her head before carrying out the ancient surgical technique of trepanning.
After surviving a trepanning operation at the hands of military surgeons, Apollinaire was struck down in the last days of the war with the dreaded `Spanish flu'.
Located close to the Company's existing facility on Lumberdale Street, the new facility is the first within the Jorgensen organization to offer trepanning of steel bar.
Tenders are invited for Facing Cutter Kit For Trepanning Of Air Box Channel As Per Dlw Drg No Inkmgm0147 Alt-A.
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Nelson continued, "During the first quarter of fiscal 2006 we opened our Spokane, WA, satellite and expanded our internal value added capabilities by opening our Houston bar trepanning facility.
In trepanning the cutting tool produces a hole by removing a disk shaped piece also called slug or core, usually from flat plates.