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Word of the Day Wednesday, June 10, 2026

cyst

/sɪst/ noun · British & US
Valid in UKValid in US
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What does cyst mean?

noun

A closed sac or capsule, especially one containing a fluid or semi-fluid substance, such as pus or a secretion. A cyst can be a normal or abnormal growth in the body.

Example

"The doctor ordered a biopsy to determine if the lump on her skin was a cyst or a tumor."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for cyst

Rhymes with cyst

Etymologically related