cryptogrammatic
/ˌkrɪptəɡrəˈmatɪk/(also cryptogramatic)
adjective
Of or relating to a cryptogram or cryptograms; written in code or cipher.
Origin
Late 19th century; earliest use found in The Westminster Review. From crypto- + ancient Greek γραμματ-, γράμμα letter + -ic, after cryptogram, cryptogrammatist, and probably also anagrammatic.