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 ]