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- Cyst - n. - 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.
- Cyst - n. - In old authors, the urinary bladder, or the gall bladder.
- Cyst - n. - One of the bladders or air vessels of certain algae, as of the great kelp of the Pacific, and common rockweeds (Fuci) of our shores.
- Cyst - n. - 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.
- Cyst - n. - A form assumed by Protozoa in which they become saclike and quiescent. It generally precedes the production of germs. See Encystment.
- Cysted - a. - Inclosed in a cyst.
- Cystic - a. - Having the form of, or living in, a cyst; as, the cystic entozoa.
- Cystic - a. - Containing cysts; cystose; as, cystic sarcoma.
- Cystic - a. - Pertaining to, or contained in, a cyst; esp., pertaining to, or contained in, either the urinary bladder or the gall bladder.
- Cysticerce - n. - Alt. of Cysticercus
- Cysticercus - n. - The larval form of a tapeworm, having the head and neck of a tapeworm attached to a saclike body filled with fluid; -- called also bladder worm, hydatid, and measle (as, pork measle).
- Cysticule - n. - An appendage of the vestibular ear sac of fishes.
- Cystid - n. - One of the Cystidea.
- Cystidea - n. pl. - An order of Crinoidea, mostly fossils of the Paleozoic rocks. They were usually roundish or egg-shaped, and often unsymmetrical; some were sessile, others had short stems.
- Cystidean - n. - One of the Cystidea.
- Cystine - n. - A white crystalline substance, C3H7NSO2, containing sulphur, occuring as a constituent of certain rare urinary calculi, and occasionally found as a sediment in urine.
- Cystis - n. - A cyst. See Cyst.
- Cystitis - n. - Inflammation of the bladder.
- Cystocarp - n. - A minute vesicle in a red seaweed, which contains the reproductive spores.
- Cystocele - n. - Hernia in which the urinary bladder protrudes; vesical hernia.
- Cystoid - n. - Alt. of Cystoidean
- Cystoidea - n. - Same as Cystidea.
- Cystoidean - n. - Same as Cystidean.
- Cystolith - n. - A concretion of mineral matter within a leaf or other part of a plant.
- Cystolith - n. - A urinary calculus.
- Pouch - n. - A cyst or sac containing fluid.
- Hypnocyst - n. - A cyst in which some unicellular organisms temporarily inclose themselves, from which they emerge unchanged, after a period of drought or deficiency of food. In some instances, a process of spore formation seems to occur within such cysts.
- Ranula - n. - A cyst formed under the tongue by obstruction of the duct of the submaxillary gland.
- Pneumatocyst - n. - A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia.
- Steatoma - n. - A cyst containing matter like suet.
- Cystose - a. - Containing, or resembling, a cyst or cysts; cystic; bladdery.
- Zoocyst - n. - A cyst formed by certain Protozoa and unicellular plants which the contents divide into a large number of granules, each of which becomes a germ.
- Otocyst - n. - An auditory cyst or vesicle; one of the simple auditory organs of many invertebrates, containing a fluid and otoliths; also, the embryonic vesicle from which the parts of the internal ear of vertebrates are developed.
- Encystment - n. - A process by which many internal parasites, esp. in their larval states, become inclosed within a cyst in the muscles, liver, etc. See Trichina.