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virtuality
virtually
virtue
virtuosa
virtuosi
virtuosity
virtuoso
virtuous
virtuous circle
virucide
virulence
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virus
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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
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