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

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..

Spider :: Spider (n.) Any one of numerous species of arachnids comprising the order Araneina. Spiders have the mandibles converted into poison fangs, or falcers. The abdomen is large and not segmented, with two or three pairs of spinnerets near the end, by means of which they spin threads of silk to form cocoons, or nests, to protect their eggs and young. Many species spin also complex webs to entrap the insects upon which they prey. The eyes are usually eight in number (rarely six), and are situated on t

Arthromere :: Arthromere (n.) One of the body segments of Arthropods. See Arthrostraca.

Syzygy :: Syzygy (n.) Any one of the segments of an arm of a crinoid composed of two joints so closely united that the line of union is obliterated on the outer, though visible on the inner, side..

Multisect :: Multisect (a.) Divided into many similar segments; -- said of an insect or myriapod.

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

Leptocardia :: Leptocardia (n. pl.) The lowest class of Vertebrata, including only the Amphioxus. The heart is represented only by a simple pulsating vessel. The blood is colorless; the brain, renal organs, and limbs are wanting, and the backbone is represented only by a simple, unsegmented notochord. See Amphioxus..

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

Neuromere :: Neuromere (n.) A metameric segment of the cerebro-spinal nervous system.

Welwitschia :: Welwitschia (n.) An African plant (Welwitschia mirabilis) belonging to the order Gnetaceae. It consists of a short, woody, topshaped stem, and never more than two leaves, which are the cotyledons enormously developed, and at length split into diverging segments..

Chilognatha :: Chilognatha (n. pl.) One of the two principal orders of myriapods. They have numerous segments, each bearing two pairs of small, slender legs, which are attached ventrally, near together..

Segment :: Segment (n.) A piece in the form of the sector of a circle, or part of a ring; as, the segment of a sectional fly wheel or flywheel rim..

Paries :: Paries (n.) The triangular middle part of each segment of the shell of a barnacle.

Segment :: Segment (n.) A part cut off from a figure by a line or plane; especially, that part of a circle contained between a chord and an arc of that circle, or so much of the circle as is cut off by the chord; as, the segment acb in the Illustration..

Slashed :: Slashed (a.) Divided into many narrow parts or segments by sharp incisions; laciniate.

Mesoscutum :: Mesoscutum (n.) The scutum or dorsal plate of the middle thoracic segment of an insect. See Illust. of Butterfly.

Prescutum :: Prescutum (n.) The first of the four pieces composing the dorsal part, or tergum, of a thoracic segment of an insect. It is usually small and inconspicuous..

Morula :: Morula (n.) The sphere or globular mass of cells (blastomeres), formed by the clevage of the ovum or egg in the first stages of its development; -- called also mulberry mass, segmentation sphere, and blastosphere. See Segmentation..

Segment :: Segment (n.) A segment gear.

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