Definition of microfilm noun from the Oxford Advanced Learner's Dictionary

 

microfilm

 noun
noun
BrE BrE//ˈmaɪkrəʊfɪlm//
 
; NAmE NAmE//ˈmaɪkroʊfɪlm//
 
[uncountable, countable]
 
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film used for storing written information on in print of very small size
See the Oxford Advanced American Dictionary entry: microfilm