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Nucleus :: Nucleus (n.) A body, usually spheroidal, in a cell or a protozoan, distinguished from the surrounding protoplasm by a difference in refrangibility and in behavior towards chemical reagents. It is more or less protoplasmic, and consists of a clear fluid (achromatin) through which extends a network of fibers (chromatin) in which may be suspended a second rounded body, the nucleolus (see Nucleoplasm). See Cell division, under Division..

Protozoon :: Protozoon (n.) A single zooid of a compound protozoan.

Proto- :: Proto- () A combining form prefix signifying first, primary, primordial; as, protomartyr, the first martyr; protomorphic, primitive in form; protoplast, a primordial organism; prototype, protozoan..

Infusoria :: Infusoria (n. pl.) One of the classes of Protozoa, including a large number of species, all of minute size..

Polystome :: Polystome (n.) An animal having many mouths; -- applied to Protozoa.

Radio-flagellata :: Radio-flagellata (n. pl.) A group of Protozoa having both flagella and pseudopodia.

Protozoic :: Protozoic (a.) Of or pertaining to the Protozoa.

D8gregarin91 :: d8Gregarin91 (n. pl.) An order of Protozoa, allied to the Rhizopoda, and parasitic in other animals, as in the earthworm, lobster, etc. When adult, they have a small, wormlike body inclosing a nucleus, but without external organs; in one of the young stages, they are amoebiform; -- called also Gregarinida, and Gregarinaria..

Sublapsarian :: Subkingdom (n.) One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoology, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Coelentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia..

Protozoic :: Protozoic (a.) Containing remains of the earliest discovered life of the globe, which included mollusks, radiates and protozoans..

Zoocyst :: 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..

Stomatode :: Stomatode (a.) Having a mouth; -- applied to certain Protozoa.

Protozoon :: Protozoon (n.) One of the Protozoa.

Swart :: Swarmspore (n.) One of the minute flagellate germs produced by the sporulation of a protozoan; -- called also zoospore.

Seta :: Seta (n.) Any slender, more or less rigid, bristlelike organ or part; as the hairs of a caterpillar, the slender spines of a crustacean, the hairlike processes of a protozoan, the bristles or stiff hairs on the leaves of some plants, or the pedicel of the capsule of a moss..

Catallacta :: Catallacta (n. pl.) A division of Protozoa, of which Magosphaera is the type. They exist both in a myxopod state, with branched pseudopodia, and in the form of ciliated bodies united in free, spherical colonies..

Rhizopoda :: Rhizopoda (n. pl.) An extensive class of Protozoa, including those which have pseudopodia, by means of which they move about and take their food. The principal groups are Lobosa (or Am/bea), Helizoa, Radiolaria, and Foraminifera (or Reticularia). See Protozoa..

Nucleolus :: Nucleolus (n.) A small rounded body contained in the nucleus of a cell or a protozoan.

Cyst :: Cyst (n.) A form assumed by Protozoa in which they become saclike and quiescent. It generally precedes the production of germs. See Encystment.

Stomatodaeum :: Stomatoda (n. pl.) A division of Protozoa in which a mouthlike opening exists.

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