trepanner

From trepan + -er.

trepanner (plural trepanners)

1. A person who trepans.
   • 1999, Robert Lacey, Danny Danziger, The Year 1000: What life was like at the turn of The First Millennium, London: Abacus, published 2000, page 124:

     [I]n the year 1000 the trepanner had at his disposal the semi-mechanical bow drill that was used by carpenters and masons of the time.

2. A trepanning tool.