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Definition of cyst

cyst

/sɪst/
cyst
Plural:cysts
•
Adjective:cystic
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cyst Lexical Profile

cyst Game Scores & Validity

• noun

1

A closed, membranous sac or pocket in biological tissue that contains fluid, air, or semi-solid material and typically develops abnormally in the body.

Example

"The dermatologist confirmed that the small lump under her skin was a benign sebaceous cyst."

2

A tough, protective capsule or outer covering formed by certain microorganisms, parasites, or lower invertebrates during a dormant or reproductive stage to survive unfavorable environmental conditions.

Example

"Protozoan parasites often form a resilient cyst that allows them to survive in contaminated water supplies."

Synonyms
View all synonyms for cyst

• Rhymes for cyst

• Nearby Words

cyrillic
cyrtanthus
cyrus
cyst
cystic
cystitis
czar

Word Origin & Etymology

Borrowed in the early 18th century from Modern Latin cystis, which derives from Ancient Greek kystis meaning 'bladder, pouch, or sac'.

Cite this Entry

Wordmom. (2026). Definition of Cyst. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/cyst
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