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Polycystine :: Polycystine (n.) One of the Polycystina.

Acephalocyst :: Acephalocyst (n.) A larval entozoon 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..

Crinoidea :: Crinoidea (n. pl.) A large class of Echinodermata, including numerous extinct families and genera, but comparatively few living ones. Most of the fossil species, like some that are recent, were attached by a jointed stem. See Blastoidea, Cystoidea, Comatula..

Radiolaria :: Radiolaria (n. pl.) Order of rhizopods, usually having a siliceous skeleton, or shell, and sometimes radiating spicules. The pseudopodia project from the body like rays. It includes the polycystines. See Polycystina..

Cyst :: 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..

Aerocyst :: Aerocyst (n.) One of the air cells of algals.

Ectocyst :: Ectocyst (n.) The outside covering of the Bryozoa.

Ranula :: Ranula (n.) A cyst formed under the tongue by obstruction of the duct of the submaxillary gland.

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)..

Porpita :: Porpita (n.) A genus of bright-colored Siphonophora found floating in the warmer parts of the ocean. The individuals are round and disk-shaped, with a large zooid in the center of the under side, surrounded by smaller nutritive and reproductive zooids, and by slender dactylozooids near the margin. The disk contains a central float, or pneumatocyst..

Cyst :: Cyst (n.) In old authors, the urinary bladder, or the gall bladder..

Urocyst :: Urocyst (n.) The urinary bladder.

Polycystina :: Polycystina (n. pl.) A division of Radiolaria including numerous minute marine species. The skeleton is composed of silica, and is often very elegant in form and sculpture. Many have been found in the fossil state..

Sporocyst :: Sporocyst (n.) An asexual zooid, usually forming one of a series of larval forms in the agamic reproduction of various trematodes and other parasitic worms. The sporocyst generally develops from an egg, but in its turn produces other larvae by internal budding, or by the subdivision of a part or all of its contents into a number of minute germs. See Redia..

Cystolithic :: Cystolithic (a.) Relating to stone in the bladder.

Encysted :: Encysted (a.) Inclosed in a cyst, or a sac, bladder, or vesicle; as, an encysted tumor..

Vesicle :: Vesicle (n.) A bladderlike vessel; a membranous cavity; a cyst; a cell.

Trichocyst :: Trichocyst (n.) A lasso cell.

Encystation :: Encystation (n.) Encystment.

Encystment :: Encystment (n.) A process which, among some of the lower forms of life, precedes reproduction by budding, fission, spore formation, etc..

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