Definition of cyst
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 asa : a resting spore of many algaeb : a gas-filled vesicle (as of a rockweed or bladderwort)c : a capsule formed about a minute organism going into a resting or spore stage; also : this capsule with its contentsd : a resistant cover about a parasite produced by the parasite or the host
Recent Examples of cyst from the Web
Picking this up may lead to rashes, boils, and cysts.
Woods has surgery to remove fluid inside and outside his ACL in his left knee, and to remove benign cysts.
Because of pressure from the weight on top of him, cysts on Farmer's kidney burst.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'cyst'. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Definition of cyst-
: bladder cystitis : sac cystocarp
Origin and Etymology of cyst-
French, from Greek kyst-, kysto-, from kystis
Definition of -cyst
: bladder : sac blastocyst
Origin and Etymology of -cyst
New Latin -cystis, from Greek kystis
CYST Defined for English Language Learners
Definition of cyst for English Language Learners
medical : a growth filled with liquid that forms in or on your body
CYST Defined for Kids
Definition of cyst for Students
1 : an abnormal lump or sac that forms in or on the body
2 : a saclike structure with a protective covering or a body (as a spore) with such a covering
Medical Definition of cyst
1: a closed sac having a distinct membrane and developing abnormally in a body cavity or structure
2: a body resembling a cyst: asa: a capsule formed about a minute organism going into a resting or spore stage; also : this capsule with its contentsb: a resistant cover about a parasite produced by the parasite or the host—compare hydatid 2a
Seen and Heard
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