from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A rock-boring tool used in mining for sinking shafts.
- n. Medicine A trephine.
- transitive v. To bore (a shaft) with a trepan.
- transitive v. Medicine To trephine.
- transitive v. To trap; ensnare.
- n. A trickster.
- n. A trick or snare.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A tool used to bore through rock when sinking shafts.
- n. A surgical instrument used to remove a circular section of bone from the skull; a trephine.
- v. To create a large hole by making a narrow groove outlining the shape of the hole and then removing the plug of material remaining by less expensive means.
- v. To use a trepan; to trephine.
- n. A trickster.
- v. To trick; to ensnare; to seduce.
from the GNU version of the Collaborative International Dictionary of English
- n. A crown-saw or cylindrical saw for perforating the skull, turned, when used, like a bit or gimlet. See trephine.
- n. A kind of broad chisel for sinking shafts.
- v. To perforate (the skull) with a trepan, so as to remove a portion of the bone, and thus relieve the brain from pressure or irritation; to perform an operation with the trepan.
- n. A snare; a trapan.
- n. a deceiver; a cheat.
- transitive v. To insnare; to trap; to trapan.
from The Century Dictionary and Cyclopedia
- n. An instrument for boring; a borer.
- n. The name given by the French to a boring-tool used for sinking wells and mining shafts to great depths and sometimes of great dimensions.
- n. An instrument, in the form of a crown-saw, used by surgeons for removing parts of the bones of the skull, in order to relieve the brain from pressure or irritation. The trephine is an improved form of this instrument. See cuts under crown-saw and trephine.
- To perforate by a trepan, especially by the surgical trepan; operate on with a trepan.
- See trapan.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- v. cut a hole with a trepan, as in surgery
- n. a surgical instrument used to remove sections of bone from the skull
- n. a drill for cutting circular holes around a center
Middle English trepane, surgical crown saw, from Medieval Latin trepanum, from Greek trūpanon, borer, from trūpān, to pierce, from trūpē, hole.
Origin unknown.(American Heritage® Dictionary of the English Language, Fourth Edition)
From French trephine. (Wiktionary)
Possibly from Old English treppan ("to trap"). (Wiktionary)