cyst

n. saclike growth containing fluid

This is an article about cysts in the body.For the ICAO airport code CYST see St. Theresa Point Airport.For hard-shelled resting stages of some small organisms, see encystment. A cyst (soft "c", rhymes with "list") is a closed sac having a distinct membrane and division on the nearby tissue. They may contain air, fluids, or semi-solid material. A collection of pus is called an abscess, not a cyst. Once formed, the cyst will remain in the tissue permanently and can be removed by surgery and by taking medication that will dissolve the "sac".
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St. Theresa Point Airport, , is located 0.8 nautical miles (1.5 km) north of St. Theresa Point, Manitoba, Canada.
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Cyst 1. bladder. 2. an abnormal closed epithelium-lined cavity in the body, containing liquid or semisolid material. 3. [more]Cyst - Community and Resources

Noun
1. a closed sac that develops abnormally in some body structure
(hypernym) pathology
(hyponym) dermoid cyst
2. a small anatomically normal sac or bladderlike structure (especially one containing fluid)
(synonym) vesicle
(hypernym) sac
(hyponym) lacrimal sac, tear sac, dacryocyst

(n.)
One of the bladders or air vessels of certain algae, as of the great kelp of the Pacific, and common rockweeds (Fuci) of our shores.
  

(n.)
In old authors, the urinary bladder, or the gall bladder.
  

(n.)
A small capsule or sac of the kind in which many immature entozoans exist in the tissues of living animals; also, a similar form in Rotifera, etc.
  

(n.)
A pouch or sac without opening, usually membranous and containing morbid matter, which is accidentally developed in one of the natural cavities or in the substance of an organ.
  

(n.)
A form assumed by Protozoa in which they become saclike and quiescent. It generally precedes the production of germs. See Encystment.