Cyst Definition

sĭst
cysts
noun
cysts
Such a structure or pocket in the body when abnormal and filled with fluid or diseased matter.
Webster's New World
A sac or vesicle in the body.
American Heritage Medicine
Any of certain saclike structures in plants or animals.
Webster's New World
A spherical, usually thick membrane, resistant to freezing, drying, etc., with which certain organisms are surrounded when in a resting stage.
Webster's New World
The definition of a cyst is a closed sac or hollow cavity filled with liquid that develops unnaturally in people, animals or plants.
When a hollow fluid-filled cavity appears in the tissue of your body where it does not belong, this is an example of a cyst.
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Webster's New World
Sac, pouch, bladder.
Blastocyst.
Webster's New World
other
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.
American Heritage Science

Other Word Forms of Cyst

Noun

Singular:
cyst
Plural:
cysts

Origin of Cyst

  • New Latin cystis from Greek kustis bladder kwes- in Indo-European roots

    From American Heritage Dictionary of the English Language, 5th Edition

  • From Latin cystis, from Ancient Greek κύστις (kustis, “anatomical sac”)

    From Wiktionary

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