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Article :: Article (n.) One of the segments of an articulated appendage.

Anadromous :: Anadromous (a.) Tending upwards; -- said of terns in which the lowest secondary segments are on the upper side of the branch of the central stem.

Bilobate :: Bilobate (a.) Divided into two lobes or segments.

Spheromere :: Spheromere (n.) Any one of the several symmetrical segments arranged around the central axis and composing the body of a radiate anmal.

Metasternum :: Metasternum (n.) The ventral plate of the third or last segment of the thorax of insects.

Annelida :: Annelida (n. pl.) A division of the Articulata, having the body formed of numerous rings or annular segments, and without jointed legs. The principal subdivisions are the Chaetopoda, including the Oligochaeta or earthworms and Polychaeta or marine worms; and the Hirudinea or leeches. See Chaetopoda..

Chaetopoda :: Chaetopoda (n. pl.) A very extensive order of Annelida, characterized by the presence of lateral setae, or spines, on most or all of the segments. They are divided into two principal groups: Oligochaeta, including the earthworms and allied forms, and Polychaeta, including most of the marine species..

Mollusca :: Mollusca (n. pl.) One of the grand divisions of the animal kingdom, including the classes Cephalopoda, Gastropoda, PteropodaScaphopoda, and Lamellibranchiata, or Conchifera. These animals have an unsegmented bilateral body, with most of the organs and parts paired, but not repeated longitudinally. Most of them develop a mantle, which incloses either a branchial or a pulmonary cavity. They are generally more or less covered and protected by a calcareous shell, which may be univalve, bivalve, or m

Osmaterium :: Osmaterium (n.) One of a pair of scent organs which the larvae of certain butterflies emit from the first body segment, either above or below..

Arthrostraca :: Arthrostraca (n. pl.) One of the larger divisions of Crustacea, so called because the thorax and abdomen are both segmented; Tetradecapoda. It includes the Amphipoda and Isopoda..

Segment :: Segment (n.) One of the divisions, rings, or joints into which many animal bodies are divided; a somite; a metamere; a somatome..

Micromere :: Micromere (n.) One of the smaller cells, or blastomeres, resulting from the complete segmentation of a telolecithal ovum..

Pedate :: Pedate (a.) Palmate, with the lateral lobes cleft into two or more segments; -- said of a leaf..

Tapeworm :: Tapeworm (n.) Any one of numerous species of cestode worms belonging to Taenia and many allied genera. The body is long, flat, and composed of numerous segments or proglottids varying in shape, those toward the end of the body being much larger and longer than the anterior ones, and containing the fully developed sexual organs. The head is small, destitute of a mouth, but furnished with two or more suckers (which vary greatly in shape in different genera), and sometimes, also, with hooks for adh

Centrolecithal :: Centrolecithal (a.) Having the food yolk placed at the center of the ovum, segmentation being either regular or unequal..

Cant :: Cant (n.) A segment of he rim of a wooden cogwheel.

Diplopoda :: Diplopoda (n. pl.) An order of myriapods having two pairs of legs on each segment; the Chilognatha.

Morulation :: Morulation (n.) The process of cleavage, or segmentation, of the ovum, by which a morula is formed..

Amphiblastic :: Amphiblastic (a.) Segmenting unequally; -- said of telolecithal ova with complete segmentation.

Epimere :: Epimere (n.) One of the segments of the transverse axis, or the so called homonymous parts; as, for example, one of the several segments of the extremities in vertebrates, or one of the similar segments in plants, such as the segments of a segmented leaf..

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