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1630s, "pertaining to the gall bladder," from French cystique (16c.), from Modern Latin cysticus, from Greek kystis "bladder, pouch." Meaning "pertaining to a cyst" is from 1713. Cystic fibrosis coined in 1938.
cystic cys·tic (sĭs'tĭk)
Of, relating to, or having the characteristic of a cyst.
Having or containing cysts or a cyst.
Enclosed in a cyst.
Of, relating to, or involving the gallbladder or urinary bladder.