Trephine /(?; 277)/

Tre·phine

Trephine

n.
  1. An instrument for trepanning, being an improvement on the trepan. It is a circular or cylindrical saw, with a handle like that of a gimlet, and a little sharp perforator called the center pin. (Surg.)

Trephine

v. t.

imp. & p. p. Trephined; p. pr. & vb. n. Trephining

  1. To perforate with a trephine; to trepan.