ciphermanual
nounUK /ˈsaɪfəˌmænjuəl/
US /ˈsaɪfərˌmænjuəl/
A ciphermanual is a book that teaches you how to write and solve secret codes.
The spy hid the ciphermanual inside a hollow tree so no one could read the secret messages.
RELATED WORDS
OTHER MEANINGS
2. A reference book listing cipher systems and their keys.
The museum displayed an old ciphermanual used by wartime codebreakers.
3. A set of written instructions for using a cipher machine.
She followed the ciphermanual to set the rotors on the machine.
4. A guide for creating secret alphabets and symbols.
The children made their own ciphermanual with drawings of funny symbols.