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trepan    
n. 环锯,钻孔机
vt. 用环锯行手术,诱入圈套,欺骗

环锯,钻孔机用环锯行手术,诱入圈套,欺骗

trepan
n 1: a surgical instrument used to remove sections of bone from
the skull [synonym: {trepan}, {trephine}]
2: a drill for cutting circular holes around a center
v 1: cut a hole with a trepan, as in surgery

Trepan \Tre*pan"\, n. [F. tr['e]pan (cf. Sp. tr['e]pano, It.
trepano, trapano), LL. trepanum, fr. Gr. ? a borer, auger,
trepan, fr. ? to bore, ? a hole. Cf. {Trephine}.]
1. (Surg.) A crown-saw or cylindrical saw for perforating the
skull, turned, when used, like a bit or gimlet. See
{Trephine}.
[1913 Webster]

2. (Mining) A kind of broad chisel for sinking shafts.
[1913 Webster]


Trepan \Tre*pan"\, v. t. & i. [imp. & p. p. {Trepanned}; p. pr.
& vb. n. {Trepanning}.] [Cf. F. tr['e]paner. See {Trepan} a
saw.] (Surg.)
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.
[1913 Webster]


Trepan \Tre*pan"\, n. [See {Trapan}.]
1. A snare; a trapan.
[1913 Webster]

Snares and trepans that common life lays in its way.
--South.
[1913 Webster]

2. a deceiver; a cheat.
[1913 Webster]

He had been from the beginning a spy and a trepan.
--Macaulay.
[1913 Webster]


Trepan \Tre*pan"\, v. t.
To insnare; to trap; to trapan.
[1913 Webster]

Guards even of a dozen men were silently trepanned from
their stations. --De Quincey.
[1913 Webster]


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