'Centre punch' definitions:

Definition of 'Centre punch'

From: GCIDE

Center punch \Center punch\, or Centre punch \Centre punch\ (Mech.) (a) A punch for making indentations or dots in a piece of work, as for suspension between lathe centers, etc. (b) A punch for punching holes in sheet metal, having a small conical center to insure correct locating. [Webster 1913 Suppl.] Center seal