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optima
optimal
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optical mouse
op·ti·cal mouse (plural op·ti·cal mice)


noun 
Definition:
 
mouse used on reflective pad: a computer mouse that registers a change in position by detecting reflected light from a pair of light-emitting diodes and translating it into cursor movement
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
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