code book

American  

noun

1. a book containing a list of code signals with their meanings, usually arranged alphabetically.

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Etymology

Origin of code book

First recorded in 1880–85

Example Sentences

We, then decided after scanning the code book, that we wanted to make sure that this was a prosecution of both sets of victims, the majority of which were Kenyan victims.

From MSNBC • Jun. 19, 2019

At spy stations, young visitors can imitate her method, write messages in invisible ink and use a cipher wheel, an early encryption and decryption device, to reveal information in Tallmadge’s code book.

From New York Times • Sep. 20, 2018

A well-thumbed code book is preserved for display.

From Los Angeles Times • Sep. 24, 2016

In retrospect, many intelligence experts now play down the potential value of obtaining a code machine and possibly a legible code book.

From Time Magazine Archive

Most significantly, we both use precisely the same code book for translating nucleic acid information into protein information, as do virtually all the other creatures on the planet.'

From "Cosmos" by Carl Sagan