The Collaborative International Dictionary of English v.0.48:

Cystic \Cyst"ic\ (s?s"t?k), a. [Cf. F. cystique.]
   1. Having the form of, or living in, a cyst; as, the cystic
      entozoa.
      [1913 Webster]

   2. Containing cysts; cystose; as, cystic sarcoma.
      [1913 Webster]

   3. (Anat.) Pertaining to, or contained in, a cyst; esp.,
      pertaining to, or contained in, either the urinary bladder
      or the gall bladder.
      [1913 Webster]

   Cystic duct, the duct from the gall bladder which unites
      with the hepatic to form the common bile duct.

   Cystic worm (Zool.), a larval tape worm, as the cysticercus
      and echinococcus.
      [1913 Webster] Cysticerce

WordNet (r) 3.0 (2006):

cystic
    adj 1: of or relating to a normal cyst (as the gallbladder or
           urinary bladder)
    2: of or relating to or resembling a cyst