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Definition of thumb index noun from the Oxford Advanced Learner's Dictionary

thumb index

noun
 
/ˈθʌm ɪndeks/
 
/ˈθʌm ɪndeks/
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  1. a series of cuts in the edge of a book, with letters of the alphabet on them, to help you to find the section that you want more easily
See thumb index in the Oxford Advanced American Dictionary
Check pronunciation: thumb index

Nearby words

trait
noun
 
 
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B2
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