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viro-
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virology
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virtual
virtual assistant
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Virtual Reality Modeling Language
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virtual focus
vir·tu·al fo·cus (plural vir·tu·al fo·ci)


noun 
Definition:
 
apparent origin of divergent light rays: the point from which divergent reflected or refracted light rays seem to originate
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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