- Perforation by Webster's
(n.) A hole made by boring or piercing; an aperture.(n.) The act of perforating or of boring or...
- Auger by Webster's
(n.) An instrument for boring or perforating soils or rocks, for determining the quality of soils...
- Boring Bar by Great Soviet Encyclopedia
a device for boring holes; it is in the form of a cylindrical spindle with radially placed holes,...
- auger by Liam Rivera
a hand tool with a bit shaped like a corkscrew, for boring holes in wood a larger tool of the...
- Perforate by Webster's
(v.) To bore through; to pierce through with a pointed instrument; to make a hole or holes through...