Centre Drill : A drill which drills a tapered hole in a workpiece, usually in the centre, subsequently used to mount the workpiece in a lathe, between 'centres', or as an accurate starting point for a drill
Ministry of Business, Innovation and Employment, Glossary of terms and acronyms, Wellington, New Zealand 2010. http://wwwsosh.govt.nz/resources/glossary-u.shtml, (Occupn Hlth and Sfty - Brit) {530}