1
: a closed sac having a distinct membrane and developing abnormally in a cavity or structure of the body
2
: a body resembling a cyst: such as
a
: a resting spore of many algae
b
: the air bladder of certain algae or aquatic plants (such as rockweed)
c
: a capsule formed about a minute organism going into a resting or spore stage
also
: this capsule with its contents
d
: a resistant cover about a parasite produced by the parasite or the host
: bladder : sac
blastocyst
Examples of cyst in a Sentence
Recent Examples on the Web
San Diego Union-Tribune, 14 May 2024
Treatment options may include surgery to remove the cysts, as well as anti-parasitic medications and anti-inflammatories to eliminate the parasite and alleviate inflammation.
—John Loeppky, Verywell Health, 10 May 2024
See all Example Sentences for cyst 
Noun
Chole refers to bile; cyst is another word for bladder.
—San Diego Union-Tribune, 14 May 2024
Treatment options may include surgery to remove the cysts, as well as anti-parasitic medications and anti-inflammatories to eliminate the parasite and alleviate inflammation.
—John Loeppky, Verywell Health, 10 May 2024
See all Example Sentences for cyst
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'cyst.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near cyst
Cite this Entry
“Cyst.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cyst. Accessed 3 Jun. 2024.
Copy CitationKids Definition
cyst
noun1
: a closed pouch or sac of fluid or solid material that develops in the body in some diseased conditions
2
: a covering resembling a cyst or a body (as a spore) with such a covering
cystic
adjective
ˈsis-tik
Medical Definition
cyst
noun1
: a closed sac having a distinct membrane and developing abnormally in a body cavity or structure
2
: a body resembling a cyst: as
a
: a capsule formed about a minute organism going into a resting or spore stage
also
: this capsule with its contents
b
: a resistant cover about a parasite produced by the parasite or the host compare hydatid sense 2a
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