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Hydranth :: Hydranth (n.) One of the nutritive zooids of a hydroid colony. Also applied to the proboscis or manubrium of a hydroid medusa. See Illust. of Hydroidea.

Zooid :: Zooid (n.) One of the individual animals in a composite group, as of Anthozoa, Hydroidea, and Bryozoa; -- sometimes restricted to those individuals in which the mouth and digestive organs are not developed..

Spirant :: Spiralozooid (n.) One of the special defensive zooids of certain hydroids. They have the form of long, slender tentacles, and bear lasso cells..

Deuterozooid :: Deuterozooid (n.) One of the secondary, and usually sexual, zooids produced by budding or fission from the primary zooids, in animals having alternate generations. In the tapeworms, the joints are deuterozooids..

Systematic :: System (n.) One of the stellate or irregular clusters of intimately united zooids which are imbedded in, or scattered over, the surface of the common tissue of many compound ascidians..

Ooecium :: Ooecium (n.) One of the special zooids, or cells, of Bryozoa, destined to receive and develop ova; an ovicell. See Bryozoa..

Gonosome :: Gonosome (n.) The reproductive zooids of a hydroid colony, collectively..

Hydrophyllium :: Hydrophyllium (n.) One of the flat, leaflike, protective zooids, covering other zooids of certain Siphonophora..

Adelocodonic :: Adelocodonic (a.) Applied to sexual zooids of hydroids, that have a saclike form and do not become free; -- opposed to phanerocodonic..

Polypite :: Polypite (n.) One of the feeding zooids, or polyps, of a coral, hydroid, or siphonophore; a hydranth. See Illust. of Campanularian..

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

Diphyozooid :: Diphyozooid (n.) One of the free-swimming sexual zooids of Siphonophora.

Antherozooid :: Antherozooid (n.) One of the mobile male reproductive bodies in the antheridia of cryptogams.

Bryozoum :: Bryozoum (n.) An individual zooid of a bryozoan coralline, of which there may be two or more kinds in a single colony. The zooecia usually have a wreath of tentacles around the mouth, and a well developed stomach and intestinal canal; but these parts are lacking in the other zooids (Avicularia, Ooecia, etc.)..

Polyzoon :: Polyzoon (n.) One of the individual zooids forming the compound organism of a polyzoan.

Polypide :: Polypide (n.) One of the ordinary zooids of the Bryozoa.

Sporophore :: Sporogony (n.) The growth or development of an animal or a zooid from a nonsexual germ.

Stoloniferous :: Stolon (n.) An extension of the integument of the body, or of the body wall, from which buds are developed, giving rise to new zooids, and thus forming a compound animal in which the zooids usually remain united by the stolons. Such stolons are often present in Anthozoa, Hydroidea, Bryozoa, and social ascidians. See Illust. under Scyphistoma..

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..

Zooidal :: Zooidal (a.) Of or pertaining to a zooid; as, a zooidal form..

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