DictionaryRoot: kystis
Greek
kystis
bladder, pouch
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adjective
cystic
SIS-tik/sˈɪstɪk/
Involving fluid-filled sacs in body tissue.
Etymology
The bladder-or-pouch base makes this a relational adjective. Originally referring to the gall bladder, cystic later came to describe abnormal sacs in tissue or conditions involving them.