Category:Trepan

Tre*pan", n. Etym: [f. trépan (cf. Sp. trépano, it. trepano, Trapano), ll. trepanum, fr. Gr. Trephine.]

1. (surg.)

Defn: a crown-saw or cylindrical saw for perforating the skull, Turned, when used, like a bit or gimlet. See trephine.

2. (mining)

Defn: a kind of broad chisel for sinking shafts.

Trepan Tre*pan", v. t. & i. [imp. & p. p. Trepanned; p. pr. & vb. n. Trepanning.] Etym: [cf. F. trépaner. See trepan a saw.] (surg.)

Defn: 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 Tre*pan", n. Etym: [see trapan.]

1. A snare; a trapan. Snares and trepans that common life lays in its way. South.

2. a deceiver; a cheat. He had been from the beginning a spy and a trepan. Macaulay.

Trepan Tre*pan", v. t.

Defn: to insnare; to trap; to trapan. Guards even of a dozen men were silently trepanned from their Stations. De quincey.