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double over
double-page spread
double-park
double play
double pneumonia
double-quick
double quote
double reed
double refraction
double rhyme
double salt
double sculls
double sharp
double-sided
double-skin
double-space
double spread
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double refraction
dou·ble re·frac·tion


noun 
Definition:
 
optics 
Same as  birefringence
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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