Definition of zooid

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

Lern More About Zooid

Coenoecium :: Coenoecium (n.) The common tissue which unites the various zooids of a bryozoan.
Ooecium :: Ooecium (n.) One of the special zooids, or cells, of Bryozoa, destined to receive and develop ova; an ovicell. See Bryozoa..
Proliferation :: Proliferation (n.) The production of numerous zooids by budding, especially when buds arise from other buds in succession..
Zoon :: Zoon (n.) An animal which is the sole product of a single egg; -- opposed to zooid.
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..
Sporophore :: Sporogony (n.) The growth or development of an animal or a zooid from a nonsexual germ.
Zooidal :: Zooidal (a.) Of or pertaining to a zooid; as, a zooidal form..
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.)..
Isogonism :: Isogonism (n.) The quality of having similar sexual zooids or gonophores and dissimilar hydrants; -- said of certain hydroids.
Blastostyle :: Blastostyle (n.) In certain hydroids, an imperfect zooid, whose special function is to produce medusoid buds. See Hydroidea, and Athecata..
Diphyozooid :: Diphyozooid (n.) One of the free-swimming sexual zooids of Siphonophora.
Athecata :: Athecata (n. pl.) A division of Hydroidea in which the zooids are naked, or not inclosed in a capsule. See Tubularian..
Calicle :: Calicle (n.) One of the small cuplike cavities, often with elevated borders, covering the surface of most corals. Each is formed by a polyp. (b) One of the cuplike structures inclosing the zooids of certain hydroids. See Campanularian..
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..
Adnate :: Adnate (a.) Growing with one side adherent to a stem; -- a term applied to the lateral zooids of corals and other compound animals.
Ascidiarium :: Ascidiarium (n.) The structure which unites together the ascidiozooids in a compound ascidian.
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..
Sporosac :: Sporosac (n.) A hydrozoan reproductive zooid or gonophore which does not become medusoid in form or structure. See Illust. under Athecata.
Dactylozooid :: Dactylozooid (n.) A kind of zooid of Siphonophora which has an elongated or even vermiform body, with one tentacle, but no mouth. See Siphonophora..
Spirant :: Spiralozooid (n.) One of the special defensive zooids of certain hydroids. They have the form of long, slender tentacles, and bear lasso cells..
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