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dot-matrix printer

noun
1.
(computing) a printer in which each character is produced as an array of dots by a printhead
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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dot-matrix printer in Science
dot-matrix printer  
An impact printer that prints text and graphic images by hammering the ends of pins against an ink ribbon. This produces characters or images made up of a matrix, or pattern, of dots.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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