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two-way mirror

noun

one-way mirror

noun
1.
a sheet of glass that can be seen through from one side and is a mirror on the other, used especially for observation of criminal suspects by law-enforcement officials or witnesses.
Also called two-way mirror.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for two way mirror

two-way mirror

noun
1.
a half-silvered sheet of glass that functions as a mirror when viewed from one side but is translucent from the other
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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Word Value for two

6
6
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