Cyst

//sɪst// noun

Definitions

Noun
  1. 1
    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.
  2. 2
    a small anatomically normal sac or bladderlike structure (especially one containing fluid) wordnet
  3. 3
    a closed sac that develops abnormally in some body structure wordnet

Etymology

From Late Latin cystis, from Ancient Greek κύστις (kústis, “anatomical sac”).

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