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Tunicin :: Tunicin (n.) Animal cellulose; a substance present in the mantle, or tunic, of the Tunicates, which resembles, or is identical with, the cellulose of the vegetable kingdom..

Acephala :: Acephala (n. pl.) That division of the Mollusca which includes the bivalve shells, like the clams and oysters; -- so called because they have no evident head. Formerly the group included the Tunicata, Brachiopoda, and sometimes the Bryozoa. See Mollusca..

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

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

Desmomyaria :: Desmomyaria (n. pl.) The division of Tunicata which includes the Salpae. See Salpa.

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

Chordata :: Chordata (n. pl.) A comprehensive division of animals including all Vertebrata together with the Tunicata, or all those having a dorsal nervous cord..

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..

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..

Tabard :: Tabard (n.) A sort of tunic or mantle formerly worn for protection from the weather. When worn over the armor it was commonly emblazoned with the arms of the wearer, and from this the name was given to the garment adopted for heralds..

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

Endostyle :: Endostyle (n.) A fold of the endoderm, which projects into the blood cavity of ascidians. See Tunicata..

Tunic :: Tunic (n.) A natural covering; an integument; as, the tunic of a seed..

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

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

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..

Sea Squirt :: Sea squirt () An ascidian. See Illust. under Tunicata.

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

Tethydan :: Tethydan (n.) A tunicate.

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