cyst
noun
- closed sac growth on the body
Wiktionary
Pronunciation: /sɪst/
noun
Etymology: Etymology tree Proto-Indo-European *(s)kewH-? Proto-Indo-European *ḱewh₁-der.? Ancient Greek κύω (kúō)? Ancient Greek κύστις (kústis)der. Late Latin cystisder. English cyst From Late Latin cystis, from Ancient Greek κύστις (kústis, “anatomical sac”).
- A pouch or sac without opening, usually membranous and containing morbid matter, which develops in one of the natural cavities or in the substance of an organ.