Definition of cyst in English:

cyst

Syllabification: cyst
Pronunciation: /sist
 
/

noun

Biology
  • 1In an animal or plant, a thin-walled, hollow organ or cavity containing a liquid secretion; a sac, vesicle, or bladder.
    More example sentences
    • In the lumen of the cysts, eosinophilic or blue secretions were frequently seen, with sometimes targetoid secretion.
    • The epithelial cells lining the cyst contained abundant mucin vacuoles that filled the cytoplasm of the luminal half of the cells.
  • 1.1 Medicine In the body, a membranous sac or cavity of abnormal character containing fluid.
    More example sentences
    • We removed an aspergilloma located in the right lower lobe of the lung in a 48-year-old woman with a bronchial cyst and rheumatoid arthritis.
    • Sometimes a thin needle is used to puncture the cyst and take out fluid to test for the Echinococcus infection.
    • The walls of the cysts were mostly membranous with variable thickness.
    Synonyms
    growth, lump, tumor; abscess, wen, boil, carbuncle, polyp, humor
  • 1.2A tough protective capsule enclosing the larva of a parasitic worm or the resting stage of an organism.
    More example sentences
    • Resting cysts represent a dormant stage in which normal life processes are greatly reduced.
    • The cysts contain tapeworm larvae that develop into adult worms in people who eat under-cooked or raw meat from an infested pig.
    • One gram of fecal matter can contain 10 million viruses, one million bacteria, 1,000 parasite cysts, and 100 worm eggs.

Origin

early 18th century: from late Latin cystis, from Greek kustis 'bladder'.

More definitions of cyst

Definition of cyst in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day astrogation
Pronunciation: ˌastrə(ʊ)ˈgeɪʃ(ə)n
noun
(in science fiction) navigation in outer space