cipherwheel
nounUK /ˈsaɪfə wiːl/
US /ˈsaɪfər wiːl/
A cipher wheel is a round tool with letters on two circles that helps you write secret codes.
She turned the cipher wheel to decode the hidden message.
RELATED WORDS
OTHER MEANINGS
2. A rotating disk used in classical cryptography to substitute one letter for another.
The spy used a cipher wheel to scramble the message before sending it.
3. A puzzle toy with two spinning rings of letters for making and breaking secret words.
The children played with a cipher wheel to send notes to each other.
4. Any wheel-shaped device that converts plain text into coded text.
The old cipher wheel on the desk was a simple encryption machine.