flyingcipher
nounUK /ˈflaɪɪŋˌsaɪfə/
US /ˈflaɪɪŋˌsaɪfər/
A flyingcipher is a secret code that travels through the air.
The pilot sent a flyingcipher to the base so nobody else could read the message.
OTHER MEANINGS
2. A hidden message carried by a bird or flying machine.
The spy tied a flyingcipher to the pigeon's leg.
3. A puzzle that you solve by looking at the sky.
The children made a flyingcipher from cloud shapes.
4. A special password used only by pilots.
Only the captain knew the flyingcipher for the night flight.