cyst

cyst
n.
1) an abnormal sac or closed cavity lined with epithelium and filled with liquid or semisolid matter. There are many varieties of cysts occurring in different parts of the body. Retention cysts arise when the outlet of a glandular duct is blocked, as in sebaceous cysts. Some cysts are congenital, due to abnormal embryonic development; for example, dermoid cysts. Others are tumours containing cells that secrete mucus or other substances, and another type of cyst is formed by parasites in the body (see hydatid). Cysts may occur in the jaws: a dental cyst occurs at the apex of a tooth, a dentigerous cyst occurs around the crown of an unerupted tooth, and an eruption cyst forms over an erupting tooth.
2) a dormant stage produced during the life cycle of certain protozoan parasites of the alimentary canal, including Giardia and Entamoeba. Cysts, passed out in the faeces, have tough outer coats that protect the parasites from unfavourable conditions. The parasites emerge from their cysts when they are eaten by a new host.
3) a structure formed by and surrounding the larvae of certain parasitic worms.

The new mediacal dictionary. 2014.

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  • cyst — cyst·adenoma; cyst·ous; dac·ry·o·cyst; ec·to·cyst; en·cyst; en·cyst·ment; en·do·cyst; ex·cyst; het·ero·cyst; hyp·no·cyst; lith·o·cyst; mac·ro·cyst; mi·cro·cyst; nem·a·to·cyst; ole·o·cyst; oo·cyst; oto·cyst; ovi·cyst; peri·cyst; phyl·lo·cyst;… …   English syllables

  • cyst- — cyst(o) , cyste ♦ Éléments, du gr. kustis « vessie ». cyste, cyst(i) , cysto . éléments, du gr. kustis, vessie . ⇒CYST , CYSTI , CYSTO , élément préf. Élément préf. tiré du gr. « vessie » et entrant dans la formation de termes de méd., bot. et… …   Encyclopédie Universelle

  • cyst|ic — «SIHS tihk», adjective. 1. of or like a cyst. 2. having a cyst or cysts. 3. enclosed in a cyst; encysted. 4. of the bladder. 5. of the gall bladder …   Useful english dictionary

  • Cyst — (s[i^]st), n. [Gr. ky stis bladder, bag, pouch, fr. ky ein to be pregnant. Cf. {Cyme}.] 1. (Med.) (a) A pouch or sac without opening, usually membranous and containing morbid matter, which is accidentally developed in one of the natural cavities… …   The Collaborative International Dictionary of English

  • cyst- — Cyst [griech. kýstis = Harnblase, Beutel, Blase]; GS: zyst , Zyst : Bestimmungswort in Zus. mit der Bedeutung »Körperhöhlungen betreffend, aus Blasen stammend oder auf Blasen wirkend« oder Trivialstamm in chem. Namen, die sich auf ↑ Cystein (das …   Universal-Lexikon

  • Cyst- — Cyst [griech. kýstis = Harnblase, Beutel, Blase]; GS: zyst , Zyst : Bestimmungswort in Zus. mit der Bedeutung »Körperhöhlungen betreffend, aus Blasen stammend oder auf Blasen wirkend« oder Trivialstamm in chem. Namen, die sich auf ↑ Cystein (das …   Universal-Lexikon

  • -cyst — [sist] [< Gr kystis: see CYST] combining form sac, pouch, bladder [blastocyst] …   English World dictionary

  • cyst|ed — «SIHS tihd», adjective. having a cyst …   Useful english dictionary

  • cyst — cyst. См. циста. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Cyst.... — Cyst.... (v. gr.), Balg...., Blasen...., z.B. Cystalgie, Blasenschmerz etc …   Pierer's Universal-Lexikon

  • cyst — [sıst] n [Date: 1700 1800; : Modern Latin; Origin: cystis, from Greek kystis organ of the body that holds liquid ] a lump containing liquid that grows in your body or under your skin, and that sometimes needs to be removed →↑boil …   Dictionary of contemporary English

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