[syn: cabalistic, kabbalistic, qabalistic, cryptic, cryptical, sibylline]
The Collaborative International Dictionary of English v.0.48:
Cryptic \Cryp"tic\ (kr[i^]p"t[i^]k), Cryptical \Cryp"tic*al\
   (-t?-kal), a. [L. crypticus, Gr. kryptiko`s, fr. kry`ptein to
   hide.]
   Hidden; secret; occult. "Her [nature's] more cryptic ways of
   working." --Glanvill.
   [1913 Webster]
   2. incomprehensible to those not familiar with the culture or
      jargon; as, the new insurance policy is written without
      cryptic or mysterious terms.
   Syn: inscrutable, mysterious, mystifying.
        [WordNet 1.5]
   3. having a secret or hidden meaning; as, cryptic symbols
      engraved in stone; cryptic writings.
   Syn: cabalistic, occult, secret, sibylline.
        [WordNet 1.5]
   3. having a puzzling terseness; as, a cryptic note.
      [WordNet 1.5]
   4. not evident; unrecognized; as, a cryptic infection.
      [PJC]
   5. written in a code or cipher; as, a cryptic message.
   Syn: encoded, enciphered, encrypted.
        [PJC]
WordNet (r) 3.0 (2006):
cryptical
    adj 1: of an obscure nature; "the new insurance policy is
           written without cryptic or mysterious terms"; "a deep
           dark secret"; "the inscrutable workings of Providence";
           "in its mysterious past it encompasses all the dim
           origins of life"- Rachel Carson; "rituals totally
           mystifying to visitors from other lands" [syn: cryptic,
           cryptical, deep, inscrutable, mysterious,
           mystifying]
    2: having a secret or hidden meaning; "cabalistic symbols
       engraved in stone"; "cryptic writings"; "thoroughly sibylline
       in most of his pronouncements"- John Gunther [syn:
       cabalistic, kabbalistic, qabalistic, cryptic,
       cryptical, sibylline]