Cyst

3 definitions found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Cyst \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 or in the


            substance of an organ.
        (b) In old authors, the urinary bladder, or the gall
            bladder. [Written also {cystis}.]
            [1913 Webster]
  
     2. (Bot.) One of the bladders or air vessels of certain
        alg[ae], as of the great kelp of the Pacific, and common
        rockweeds ({Fuci}) of our shores. --D. C. Eaton.
        [1913 Webster]
  
     3. (Zool.)
        (a) A small capsule or sac of the kind in which many
            immature entozoans exist in the tissues of living
            animals; also, a similar form in Rotifera, etc.
        (b) A form assumed by Protozoa in which they become
            saclike and quiescent. It generally precedes the
            production of germs. See {Encystment}.
            [1913 Webster]

From WordNet (r) 2.0 [wn]:

  cyst
       n 1: a closed sac that develops abnormally in some body structure
       2: a small anatomically normal sac or bladderlike structure
          (especially one containing fluid) [syn: {vesicle}]

From Moby Thesaurus II by Grady Ward, 1.0 [moby-thes]:

  49 Moby Thesaurus words for "cyst":
     benign tumor, boil, bump, bunion, callosity, callus, cancer,
     carbuncle, carcinoma, corn, dilatation, dilation, distension,
     edema, excrescence, fungosity, fungus, furuncle, growth,
     intumescence, lump, malignant growth, metastatic tumor, mole,
     morbid growth, neoplasm, nevus, nonmalignant tumor, outgrowth,
     pimple, pock, proud flesh, pustule, rising, sarcoma,
     sebaceous cyst, swell, swelling, swollenness, tumefaction,
     tumescence, tumidity, tumor, turgescence, turgescency, turgidity,
     verruca, wart, wen