Trepan
Trepan , noun
[French trépan (compare Sp. trépano, Italian trepano, trapano), Late Latin trepanum, from Greek {not transcribed} a borer, auger, trepan, from {not transcribed} to bore, {not transcribed} a hole. Compare Trephine.]
1.
(Surgery) A crown-saw or cylindrical saw for perforating the skull, turned, when used, like a bit or gimlet. See Trephine.
2.
(Mining) A kind of broad chisel for sinking shafts.
Trepan , verb, transitive and intransitive
[Compare French trépaner. See Trepan a saw.]
(Surgery) 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.
Trepan , noun
[See Trapan.]
1.
A snare; a trapan.
Snares and trepans that common life lays in its way.
2.
a deceiver; a cheat.
He had been from the beginning a spy and a trepan.
Trepan , transitive verb
To insnare; to trap; to trapan.
Guards even of a dozen men were silently trepanned from their stations.