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optical mouse

noun
1.
(computing) a type of computer mouse that uses light-emitting and -sensing devices to detect where it is
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
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optical mouse in Technology

hardware
Any kind of mouse that uses visible light or infrared to detect changes in its position.
(1999-07-21)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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