- A crown-saw or cylindrical saw for perforating the skull,
turned, when used, like a bit or gimlet. See Trephine. - A kind of broad chisel for sinking shafts. - A snare; a trapan. - a deceiver; a cheat.
2 . Trepan
[ v. t.]
- To insnare; to trap; to trapan.
3 . Trepan
[ v. t. & i.]
- 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.