1. A secret method of writing
   "The spies communicated using a cryptograph that only they could decipher";
   - cipher, cypher, secret code
    
2. A piece of writing in code or cipher
   "The detective struggled to decipher the cryptograph left by the suspect";
   - cryptogram, secret writing
    
3. A device for deciphering codes and ciphers
   "The intelligence agency used a sophisticated cryptograph to decode intercepted messages"

Derived forms: cryptographs

Type of: code, device, piece of writing, writing, written material

Encyclopedia: Cryptograph