What does cystic mean?
Cystic is an adjective used chiefly in medicine and biology to describe anything related to cysts — abnormal, closed sacs within body tissue that may contain fluid, air, or semi-solid material. A physician might refer to a 'cystic lesion' seen on an ultrasound, or describe a tumor as having cystic components. The word also carries a second anatomical meaning: pertaining to the gallbladder or urinary bladder, as in the cystic duct that connects the gallbladder to the bile duct. By far its most familiar appearance for most people is in 'cystic fibrosis,' the inherited disorder affecting the lungs and digestion. Derived ultimately from the Greek word kystis, meaning bladder or pouch, cystic conveys a precise, clinical quality and belongs firmly to formal, technical registers rather than casual speech.
Of, relating to, or resembling a cyst; characterized by the presence of cysts.
"The biopsy confirmed the mass was a benign cystic lesion."
Primarily a clinical term; in lay contexts it appears almost only in fixed phrases such as 'cystic fibrosis' or 'cystic acne'.
Anatomy: of or relating to the gallbladder or the urinary bladder.
"Gallstones can lodge in the cystic duct, blocking the flow of bile."
Every year, thousands of people walk for a cure named after this word — 'cystic fibrosis' — yet most have no idea that 'cystic' simply means 'relating to a little bag.'
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cystic
Cystic derives from the Greek noun kystis, meaning 'bladder' or 'pouch,' which entered Latin as cystis before giving rise to English medical vocabulary. The adjective form developed alongside terms like cyst and cystitis as anatomy and pathology adopted Greek roots in the early modern period. It shares its origin with other cyst- words such as cystoscopy and encysted.
How cystic is actually used
Almost exclusively used in medical and scientific contexts; rarely appears in everyday conversation outside phrases like 'cystic fibrosis.' It carries a clinical register, so it sounds formal in general writing. The anatomical sense relating to the gallbladder (e.g., 'cystic duct,' 'cystic artery') is common in surgical terminology.
Easily confused with cystic
'Systemic' refers to something affecting the whole body or system, while 'cystic' refers specifically to cysts or bladder-related structures; the words share a similar rhythm and ending but entirely different meanings.