cross index

/krɔs ˈɪndɛks/
noun
  1. A reference in one part of a book, index, or database that directs the reader to related information in another part.
    • The encyclopedia includes a cross-index so you can find related topics easily.
    • I used the cross-index in the library catalog to locate books on both history and geography.
    • The database has a cross-index linking customer records to their order history.
verb
  1. To provide or create cross-references between different parts of a book, index, or database.
    • The editor asked me to cross-index all the author names with their book titles.
    • We need to cross-index the medical terms so that users can find related conditions.
    • The software can automatically cross-index entries in the digital archive.
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