cyst

[sist]
noun
1.
Pathology. a closed, bladderlike sac formed in animal tissues, containing fluid or semifluid matter.
2.
a bladder, sac, or vesicle.
3.
Botany, Mycology.
a.
a sporelike cell with a resistant, protective wall.
b.
a cell or cavity enclosing reproductive bodies.
4.
Zoology.
a.
a sac, usually spherical, surrounding an animal that has passed into a dormant condition.
b.
such a sac plus the contained animal.
c.
a capsule or resistant covering.

Origin:
1705–15; < Neo-Latin cystis < Greek kýstis bag, pouch, the bladder; akin to kŷma cyma

Dictionary.com Unabridged

cyst-

variant of cysto-, before a vowel: cystectomy.

-cyst

variant of cysto-, as final element in a compound word: statocyst.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
cyst (sɪst)
 
n
1.  pathol any abnormal membranous sac or blisterlike pouch containing fluid or semisolid material
2.  anatomy any normal sac or vesicle in the body
3.  a thick-walled protective membrane enclosing a cell, larva, or organism
 
[C18: from New Latin cystis, from Greek kustis pouch, bag, bladder]

-cyst
 
n combining form
indicating a bladder or sac: otocyst
 
[from Greek kustis bladder]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

cyst
1713, from Mod.L. cystis, from Gk. kystis "bladder, pouch."
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

cyst (sĭst)
n.

  1. An abnormal membranous sac containing a gaseous, liquid, or semisolid substance.

  2. A sac or vesicle in the body.

  3. A small capsulelike sac that encloses certain organisms in their dormant or larval stage.

cyst- pref.
Variant of cysto-.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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American Heritage
Science Dictionary
cyst   (sĭst)  Pronunciation Key 
  1. An abnormal membranous sac in the body, containing a gaseous, liquid, or semisolid substance.

  2. A small, capsulelike form of certain organisms that develops in response to adverse or extreme conditions. Under adverse conditions, for instance, dinoflagellates form nonmotile resting cysts that fall to the ocean or lake bottom and can remain there for years before reviving. Certain invertebrates, such as the water bear (phylum Tardigrada), also develop cysts.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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American Heritage
Cultural Dictionary
cyst [(sist)]

An abnormal saclike structure that develops in the body and is filled with fluid or semisolid material.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Example sentences
For example, when doctors feel a growth or cyst in the thyroid, they can probe
  it with a skinny needle.
The cyst has not gotten smaller, but it hasn't gotten bigger either.
Many hours later the neurologist called and told me the shadow indicated a cyst
  and not to worry.
If the egg is not expelled, fluids and other substances can build up inside the
  follicle, forming a follicular cyst.
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