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Definition of after-image noun from the Oxford Advanced Learner's Dictionary

after-image

noun
 
/ˈɑːftər ɪmɪdʒ/
 
/ˈæftər ɪmɪdʒ/
(specialist)
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  1. an image that your eye still sees after the thing that you were looking at is no longer there
indeed
adverb
 
 
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