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blue book

From Wiktionary, the free dictionary
See also: bluebook

English

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Etymology

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The term dates back to the 15th century, when large blue velvet-covered books were used for record-keeping by the Parliament of the United Kingdom.

Noun

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blue book (plural blue books)

  1. A book of statistics or almanac, usually published by an agency or as a trade publication.
  2. Used other than figuratively or idiomatically: see blue,‎ book.

See also

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