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

Campanularian :: Campanularian (n.) A hydroid of the family ampanularidae, characterized by having the polyps or zooids inclosed in bell-shaped calicles or hydrothecae..

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

Spermatozooid :: Spermatozooid (n.) A spermatozoid.

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

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..

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

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

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..

Vibraculum :: Vibraculum (n.) One of the movable, slender, spinelike organs or parts with which certain bryozoans are furnished. They are regarded as specially modified zooids, of nearly the same nature as Avicularia..

Coenoecium :: Coenoecium (n.) The common tissue which unites the various zooids of a bryozoan.

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 organic body or cell having locomotion, as a spermatic cell or spermatozooid..

Zooid :: Zooid (a.) Pertaining to, or resembling, an animal..

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.)..

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.

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

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..

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

Trophosome :: Trophosome (n.) The nutritive zooids of a hydroid, collectively, as distinguished from the gonosome, or reproductive zooids..

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