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plate mark

noun
  1. hallmark.
  2. a mark made on paper by the edge of an intaglio plate during printing.
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Origin of plate mark

First recorded in 1855–60
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for platemark

platemark

noun, verb
  1. another name for hallmark (def. 1), hallmark (def. 4)
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012