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Ascidium :: Ascidium (n.) A genus of simple ascidians, which formerly included most of the known species. It is sometimes used as a name for the Ascidioidea, or for all the Tunicata..

Tunic :: Tunic (n.) An under-garment worn by the ancient Romans of both sexes. It was made with or without sleeves, reached to or below the knees, and was confined at the waist by a girdle..

Nucleus :: Nucleus (n.) A visceral mass, containing the stomach and other organs, in Tunicata and some mollusks..

Thaliacea :: Thaliacea (n. pl.) A division of Tunicata comprising the free-swimming species, such as Salpa and Doliolum..

Tunicle :: Tunicle (n.) A slight natural covering; an integument.

Doliolum :: Doliolum (n.) A genus of freeswimming oceanic tunicates, allied to Salpa, and having alternate generations..

Tunicated :: Tunicated (a.) Covered with a tunic; covered or coated with layers; as, a tunicated bulb..

Salpa :: Salpa (n.) A genus of transparent, tubular, free-swimming oceanic tunicates found abundantly in all the warmer latitudes. See Illustration in Appendix..

Ovicyst :: Ovicyst (n.) The pouch in which incubation takes place in some Tunicata.

Ascidian :: Ascidian (n.) One of the Ascidioidea, or in a more general sense, one of the Tunicata. Also as an adj..

Tunicate :: Tunicate (a.) Alt. of Tunicate.

Tunic :: Tunic (n.) See Mantle, n., 3 (a)..

Cellulose :: Cellulose (n.) The substance which constitutes the essential part of the solid framework of plants, of ordinary wood, linen, paper, etc. It is also found to a slight extent in certain animals, as the tunicates. It is a carbohydrate, (C6H10O5)n, isomeric with starch, and is convertible into starches and sugars by the action of heat and acids. When pure, it is a white amorphous mass. See Starch, Granulose, Lignin..

Tunicated :: Tunicated (a.) Having each joint buried in the preceding funnel-shaped one, as in certain antennae of insects..

Tunicata :: Tunicata (n. pl.) A grand division of the animal kingdom, intermediate, in some respects, between the invertebrates and vertebrates, and by some writers united with the latter. They were formerly classed with acephalous mollusks. The body is usually covered with a firm external tunic, consisting in part of cellulose, and having two openings, one for the entrance and one for the exit of water. The pharynx is usually dilated in the form of a sac, pierced by several series of ciliated slits, and se

Tunicle :: Tunicle (n.) A short, close-fitting vestment worn by bishops under the dalmatic, and by subdeacons..

Urochorda :: Urochorda (n. pl.) Same as Tunicata.

Vermes :: Vermes (n. pl.) An extensive artificial division of the animal kingdom, including the parasitic worms, or helminths, together with the nemerteans, annelids, and allied groups. By some writers the branchiopods, the bryzoans, and the tunicates are also included. The name was used in a still wider sense by Linnaeus and his followers..

Ascidioidea :: Ascidioidea (n. pl.) A group of Tunicata, often shaped like a two-necked bottle. The group includes, social, and compound species. The gill is a netlike structure within the oral aperture. The integument is usually leathery in texture. See Illustration in Appendix..

Pharyngopneusta :: Pharyngopneusta (n. pl.) A group of invertebrates including the Tunicata and Enteropneusta.

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