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Spermatozooid :: Spermatozooid (n.) A spermatozoid.

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

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

Foraminifera :: Foraminifera (n. pl.) An extensive order of rhizopods which generally have a chambered calcareous shell formed by several united zooids. Many of them have perforated walls, whence the name. Some species are covered with sand. See Rhizophoda..

Zoon :: Zoon (n.) An animal which is the sole product of a single egg; -- opposed to zooid.

Siphonophora :: Siphonophora (n. pl.) An order of pelagic Hydrozoa including species which form complex free-swimming communities composed of numerous zooids of various kinds, some of which act as floats or as swimming organs, others as feeding or nutritive zooids, and others as reproductive zooids. See Illust. under Physallia, and Porpita..

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..

Zoanthus :: Zoanthus (n.) A genus of Actinaria, including numerous species, found mostly in tropical seas. The zooids or polyps resemble small, elongated actinias united together at their bases by fleshy stolons, and thus forming extensive groups. The tentacles are small and bright colored..

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..

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..

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..

Simple :: Simple (a.) Consisting of a single individual or zooid; as, a simple ascidian; -- opposed to compound..

Taster :: Taster (n.) One of a peculiar kind of zooids situated on the polyp-stem of certain Siphonophora. They somewhat resemble the feeding zooids, but are destitute of mouths. See Siphonophora..

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

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

Ascidiarium :: Ascidiarium (n.) The structure which unites together the ascidiozooids in a compound ascidian.

Polyp :: Polyp (n.) One of the feeding or nutritive zooids of a hydroid or coral.

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

Adnate :: Adnate (a.) Growing with one side adherent to a stem; -- a term applied to the lateral zooids of corals and other compound animals.

Zooid :: Zooid (n.) An animal in one of its inferior stages of development, as one of the intermediate forms in alternate generation..

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