trepan 1
— trepanation /trep'euh nay"sheuhn/ , n. — trepanner , n.
/tri pan"/ , n. , v. , trepanned, trepanning .
n.
1. a tool for cutting shallow holes by removing a core.
2. Surg. an obsolete form of the trephine resembling a carpenter's bit and brace.
v.t.
3. Mach. to cut circular disks from (plate stock) using a rotating cutter.
4. Surg. to operate upon with a trepan; trephine.
[ 1350-1400; (n.) ME trepane trepan crown saw trepanum trýpanon borer, akin to trypa hole, trypân to bore; (v) late ME trepanen, deriv. of the n. ]
trepan 2
— trepanation /trep'euh nay"sheuhn/ , n. — trepanner , n.
/tri pan"/ , n. , v. , trepanned, trepanning . Archaic.
n.
1. a person who ensnares or entraps others.
2. a stratagem; a trap.
v.t.
3. to ensnare or entrap.
4. to entice.
5. to cheat or swindle.
[ 1635-45; earlier trapan, equiv. to TRAP 1 + -an ]