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Actinomere :: Actinomere (n.) One of the radial segments composing the body of one of the Coelenterata.

Disk :: Disk (n.) The anterior surface or oral area of coelenterate animals, as of sea anemones..

Actinostome :: Actinostome (n.) The mouth or anterior opening of a coelenterate animal.

Anthozoa :: Anthozoa (n. pl.) The class of the Coelenterata which includes the corals and sea anemones. The three principal groups or orders are Acyonaria, Actinaria, and Madreporaria..

Perisome :: Perisome (n.) The entire covering of an invertebrate animal, as echinoderm or coelenterate; the integument..

Actinozoa :: Actinozoa (n. pl.) A group of Coelenterata, comprising the Anthozoa and Ctenophora. The sea anemone, or actinia, is a familiar example..

Ctenophora :: Ctenophora (n. pl.) A class of Coelenterata, commonly ellipsoidal in shape, swimming by means of eight longitudinal rows of paddles. The separate paddles somewhat resemble combs..

Hydrozoa :: Hydrozoa (n. pl.) The Acalephae; one of the classes of coelenterates, including the Hydroidea, Discophora, and Siphonophora..

Coelenterate :: Coelenterate (n.) One of the Coelentera.

Acalephae :: Acalephae (n. pl.) A group of Coelenterata, including the Medusae or jellyfishes, and hydroids; -- so called from the stinging power they possess. Sometimes called sea nettles..

Cnidoblast :: Cnidoblast (n.) One of the cells which, in the Coelenterata, develop into cnidae..

Cnida :: Cnida (n.) One of the peculiar stinging, cells found in Coelenterata; a nematocyst; a lasso cell..

Actinosome :: Actinosome (n.) The entire body of a coelenterate.

Coelenterata :: Coelenterata (n. pl.) A comprehensive group of Invertebrata, mostly marine, comprising the Anthozoa, Hydrozoa, and Ctenophora. The name implies that the stomach and body cavities are one. The group is sometimes enlarged so as to include the sponges..

Nematophora :: Nematophora (n. pl.) Same as Coelenterata.

Mesogl/a :: Mesogl/a (n.) A thin gelatinous tissue separating the ectoderm and endoderm in certain coelenterates.

Sublapsarian :: Subkingdom (n.) One of the several primary divisions of either the animal, or vegetable kingdom, as, in zoology, the Vertebrata, Tunicata, Mollusca, Articulata, Molluscoidea, Echinodermata, Coelentera, and the Protozoa; in botany, the Phanerogamia, and the Cryptogamia..

Coelentera :: Coelentera (n. pl.) Alt. of Coelenterat.

Cnidaria :: Cnidaria (n. pl.) A comprehensive group equivalent to the true Coelenterata, i. e., exclusive of the sponges. They are so named from presence of stinging cells (cnidae) in the tissues. See Coelenterata..

Planula :: Planula (n.) The very young, free-swimming larva of the coelenterates. It usually has a flattened oval or oblong form, and is entirely covered with cilia..

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