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Zoanthodeme :: Zoanthodeme (n.) The zooids of a compound anthozoan, collectively..

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..

Gonocalyx :: Gonocalyx (n.) The bell of a sessile gonozooid.

Ascidiozooid :: Ascidiozooid (n.) One of the individual members of a compound ascidian. See Ascidioidea.

Proliferate :: Proliferate (v. t.) To produce zooids by budding.

Tritozooid :: Tritozooid (n.) A zooid of the third generation in asexual reproduction.

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

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

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..

Pennatula :: Pennatula (n.) Any one of numerous species of Pennatula, Pteroides, and allied genera of Alcyonaria, having a featherlike form; a sea-pen. The zooids are situated along one edge of the side branches..

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

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

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..

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..

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..

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

Sporosac :: Sporosac (n.) A hydrozoan reproductive zooid or gonophore which does not become medusoid in form or structure. See Illust. under Athecata.

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

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

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

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