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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Center punch, or 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.
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From: WordNet (r) 2.0

 center punch
      v : make a small hole in something as a guide for a drill