virtual image

World English Dictionary
virtual image
 
n
an optical image formed by the apparent divergence of rays from a point, rather than their actual divergence from a point

Collins English Dictionary - Complete & Unabridged 10th Edition
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Virtual image is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
WordNet
virtual image

noun
a reflected optical image (as seen in a plane mirror) 
WordNet® 3.0, © 2006 by Princeton University.
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