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Hydrocorallia :: Hydrocorallia (n. pl.) A division of Hydroidea, including those genera that secrete a stony coral, as Millepora and Stylaster. Two forms of zooids in life project from small pores in the coral and resemble those of other hydroids. See Millepora..

Nectocalyx :: Nectocalyx (n.) One of the zooids of certain Siphonophora, having somewhat the form, and the essential structure, of the bell of a jellyfish, and acting as a swimming organ..

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

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.

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

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

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

Proliferous :: Proliferous (a.) Producing sexual zooids by budding; -- said of the blastostyle of a hydroid.

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

Athecata :: Athecata (n. pl.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See Tubularian..

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

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..

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

Zooid :: Zooid (n.) An organic body or cell having locomotion, as a spermatic cell or spermatozooid..

Person :: Person (n.) A shoot or bud of a plant; a polyp or zooid of the compound Hydrozoa Anthozoa, etc.; also, an individual, in the narrowest sense, among the higher animals..

Zooecium :: Zooecium (n.) One of the cells or tubes which inclose the feeling zooids of Bryozoa. See Illust. of Sea Moss.

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..

Coenenchyma :: Coenenchyma (n.) The common tissue which unites the polyps or zooids of a compound anthozoan or coral. It may be soft or more or less ossified. See Coral.

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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