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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Chat·ter mark. (a) Mach. One of the fine undulations or ripples which are formed on the surface of work by a cutting tool which chatters. (b) Geol. A short crack on a rock surface planed smooth by a glacier.
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From: WordNet (r) 2.0

 chatter mark
      n 1: marks on a glaciated rock caused by the movement of a
           glacier
      2: a mark made by a chattering tool on the surface of a
         workpiece