n. [ Gr. 'ake`falos without a head + ky`stis bladder. ] (Zool.) A larval entozoön in the form of a subglobular or oval vesicle, or hydatid, filled with fluid, sometimes found in the tissues of man and the lower animals; -- so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts of different origin. [ 1913 Webster ]

a. Pertaining to, or resembling, the acephalocysts. [ 1913 Webster ]

n. [ Aëro- + cyst. ] (Bot.) One of the air cells of algals. [ 1913 Webster ]

n. [ Gr. blasto`s sprout + E. cyst. ] (Biol.) The germinal vesicle. [ 1913 Webster ]

‖n. [ NL., fr. Gr. cholh` bile + &unr_; bladder. ] (Anat.) The gall bladder. [ 1913 Webster ]

n. [ Cholecystis + Gr. te`mnein to cut. ] (Surg.) The operation of making an opening in the gall bladder, as for the removal of a gallstone. [ 1913 Webster ]

n. [ Gr. ktei`s, kteno`s, comb + ky`stis bladder. ] (Zool.) An organ of the Ctenophora, supposed to be sensory. [ 1913 Webster ]

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 algæ, 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 ]

a. Inclosed in a cyst. [ 1913 Webster ]

a. [ Cf. F. cystique. ] 1. Having the form of, or living in, a cyst; as, the cystic entozoa. [ 1913 Webster ]

2. Containing cysts; cystose; as, cystic sarcoma. [ 1913 Webster ]

3. (Anat.) Pertaining to, or contained in, a cyst; esp., pertaining to, or contained in, either the urinary bladder or the gall bladder. [ 1913 Webster ]

Cystic duct, the duct from the gall bladder which unites with the hepatic to form the common bile duct. --
Cystic worm (Zool.), a larval tape worm, as the cysticercus and echinococcus. [ 1913 Webster ]

{ } n. [ NL. cysticercus, fr. Gr. &unr_;&unr_;&unr_;&unr_; bladder + ke`rkos tail: cf. F. cysticerque. ] (Zool.) 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). [ 1913 Webster ]

☞ These larvae live in the tissues of various living animals, and, when swallowed by a suitable carnivorous animal, develop into adult tapeworms in the intestine. See Measles, 4, Tapeworm. [ 1913 Webster ]

n. [ Dim. of cyst. ] (Anat.) An appendage of the vestibular ear sac of fishes. Owen. [ 1913 Webster ]

n. (Zool.) One of the Cystidea. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. &unr_;&unr_;&unr_;&unr_; a bladder, pouch. ] (Zool.) 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. [ 1913 Webster ]

n. (Zool.) One of the Cystidea. [ 1913 Webster ]

n. [ See Cyst. ] (Physiol. Chem.) A white crystalline substance, C3H7NSO2, containing sulphur, occuring as a constituent of certain rare urinary calculi, and occasionally found as a sediment in urine. [ 1913 Webster ]

n. [ NL. ] A cyst. See Cyst. [ 1913 Webster ]

n. [ Cyst + -itis: cf. F. cystite. ] (Med.) Inflammation of the bladder. [ 1913 Webster ]

n. [ Gr. &unr_;&unr_;&unr_;&unr_; bladder + karpo`s fruit. ] (Bot.) A minute vesicle in a red seaweed, which contains the reproductive spores. [ 1913 Webster ]

n. [ Gr. &unr_;&unr_;&unr_;&unr_; bladder + &unr_;&unr_;&unr_; tumor: cf. F. cystocele. ] (Med.) Hernia in which the urinary bladder protrudes; vesical hernia. [ 1913 Webster ]

n. Same as Cystidea. [ 1913 Webster ]

{ }, n. Same as Cystidean. [ 1913 Webster ]

n. [ Gr. &unr_;&unr_;&unr_;&unr_; bladder + -lith. ] 1. (Bot.) A concretion of mineral matter within a leaf or other part of a plant. [ 1913 Webster ]

2. (Med.) A urinary calculus. [ 1913 Webster ]

a. (Med.) Relating to stone in the bladder. [ 1913 Webster ]

n. [ Gr. &unr_;&unr_;&unr_;&unr_; bladder + &unr_;&unr_;&unr_; to form. ] (Biol.) A nucleated cell having an envelope or cell wall, as a red blood corpuscle or an epithelial cell; a cell concerned in growth. [ 1913 Webster ]

a. Containing, or resembling, a cyst or cysts; cystic; bladdery. [ 1913 Webster ]

n. [ Gr. &unr_;&unr_;&unr_; bladder + &unr_;&unr_;&unr_;&unr_; to cut: cf. F. cystotome. ] (Surg.) A knife or instrument used in cystotomy. [ 1913 Webster ]

n. [ Gr. &unr_;&unr_;&unr_;&unr_; bladder + &unr_;&unr_;&unr_;&unr_; to cut: cf. F. cystotomie. ] The act or practice of opening cysts; esp., the operation of cutting into the bladder, as for the extraction of a calculus. [ 1913 Webster ]

n. [ Ecto- + Gr. &unr_; bladder. ] (Zoöl.) The outside covering of the Bryozoa. [ 1913 Webster ]

v. t. To inclose in a cyst. [ 1913 Webster ]

n. Encystment. [ 1913 Webster ]

a. Inclosed in a cyst, or a sac, bladder, or vesicle; as, an encysted tumor. [ 1913 Webster ]

The encysted venom, or poison bag, beneath the adder's fang. Coleridge. [ 1913 Webster ]

n. 1. (Biol.) A process which, among some of the lower forms of life, precedes reproduction by budding, fission, spore formation, etc. [ 1913 Webster ]

☞ The animal (a) first contracts its body to a globular mass (b) and then secretes a transparent cyst (c), after which the mass divides into two or more parts (as in d e), each of which attains freedom by the bursting of the cyst, and becomes an individual animal. [ 1913 Webster ]

2. (Zoöl.) A process by which many internal parasites, esp. in their larval states, become inclosed within a cyst in the muscles, liver, etc. See Trichina. [ 1913 Webster ]

n. [ Endo- + Gr. &unr_; bladder, a bag. ] (Zoöl.) The inner layer of the cells of Bryozoa. [ 1913 Webster ]

a. [ Hepatic + cystic. ] (Anat.) Of or pertaining to the liver and gall bladder; as, the hepatocystic ducts. [ 1913 Webster ]

n. [ Hetero- + cyst. ] (Bot.) A cell larger than the others, and of different appearance, occurring in certain algæ related to nostoc. [ 1913 Webster ]

n. [ Gr. &unr_; sleep + E. cyst. ] (Biol.) 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. [ 1913 Webster ]

v. t. See Encyst. [ 1913 Webster ]

a. See Encysted. [ 1913 Webster ]

n. [ Litho- + cyst. ] (Zool.) A sac containing small, calcareous concretions (otoliths). They are found in many Medusæ, and other invertebrates, and are supposed to be auditory organs. [ 1913 Webster ]

‖n. [ NL. See Macro-, and Cyst. ] (Bot.) An immensely long blackish seaweed of the Pacific (Macrocystis pyrifera), having numerous almond-shaped air vessels. [ 1913 Webster ]

a. [ See Mono-, and Cyst. ] (Zool.) Of or pertaining to a division (Monocystidea) of the protozoan order Gregarinida, in which the body consists of one sac. [ 1913 Webster ]

‖n. pl. [ NL., fr. Gr. &unr_; mucus + &unr_; a bladder. ] (Zool.) A division of Infusoria including the Noctiluca. See Noctiluca. [ 1913 Webster ]

n. [ Nemato- + cyst. ] (Zool.) A lasso cell, or thread cell. See Lasso cell, under Lasso. [ 1913 Webster ]

‖prop. n. [ NL. See Nereid, and Cyst. ] (Bot.) A genus of gigantic seaweeds. [ 1913 Webster ]

☞ Nereocystis Lutkeana, of the North Pacific, has a stem many fathoms long, terminating in a great vesicle, which is crowned with a tuft of long leaves. The stem is used by the Alaskans for fishing lines. [ 1913 Webster ]

n. [ Oto- + cyst. ] (Zool. & Anat.) 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. [ 1913 Webster ]

n. [ Ovum + cyst. ] (Zool.) The pouch in which incubation takes place in some Tunicata. [ 1913 Webster ]

n. [ NL. See Peri-, and Cystitis. ] (Med.) Inflammation of the tissues surrounding the bladder. [ Webster 1913 Suppl. ]

n. [ Phyllo- + cyst. ] (Zool.) The cavity of a hydrophyllium. [ 1913 Webster ]

n. [ Pneumato- + cyst. ] (Zool.) A cyst or sac of a siphonophore, containing air, and serving as a float, as in Physalia. [ 1913 Webster ]