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index card

noun
1.
a card, often relatively small, as 3 × 5 inches (7.6 × 12.7 cm), used in noting or recording information and usually filed in an index.
Origin of index card
1925-1930
1925-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Word Value for index

13
14
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