cross-in·dex
| \ ˈkrȯs-ˈin-ˌdeks
\
\
cross-indexed; cross-indexing; cross-indexes
Definition of cross-index
1
: to index (an item) under a second or under more than one heading
2
: to supply with a cross-referenced index
cross-index a book
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“Cross-index.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cross-index. Accessed 25 Jan. 2022.
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The first known use of cross-index was in 1892
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