Definition of segment

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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..

Lern More About Segment

Segmentation :: Segmentation (n.) The act or process of dividing into segments; specifically (Biol.), a self-division into segments as a result of growth; cell cleavage; cell multiplication; endogenous cell formation..
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..
Segmental :: Segmental (a.) Of or pertaining to the segments of animals; as, a segmental duct; segmental papillae..
Uromere :: Uromere (n.) Any one of the abdominal segments of an arthropod.
Mesencephalon :: Mesencephalon (n.) The middle segment of the brain; the midbrain. Sometimes abbreviated to mesen. See Brain.
Arch :: Arch (n.) Usually a curved member made up of separate wedge-shaped solids, with the joints between them disposed in the direction of the radii of the curve; used to support the wall or other weight above an opening. In this sense arches are segmental, round (i. e., semicircular), or pointed..
Somite :: Somite (n.) One of the actual or ideal serial segments of which an animal, esp. an articulate or vertebrate, is is composed; somatome; metamere..
Thigh :: Thigh (n.) The proximal segment of the hind limb between the knee and the trunk. See Femur.
Mesosternum :: Mesosternum (n.) The ventral piece of the middle segment of the thorax in insects.
Proglottis :: Proglottis (n.) One of the free, or nearly free, segments of a tapeworm. It contains both male and female reproductive organs, and is capable of a brief independent existence..
Nephridium :: Nephridium (n.) A segmental tubule; one of the tubules of the primitive urinogenital organs; a segmental organ. See Illust. under Loeven's larva.
Cone :: Cone (v. t.) To render cone-shaped; to bevel like the circular segment of a cone; as, to cone the tires of car wheels..
Thorax :: Thorax (n.) The second, or middle, region of the body of a crustacean, arachnid, or other articulate animal. In the case of decapod Crustacea, some writers include under the term thorax only the three segments bearing the maxillipeds; others include also the five segments bearing the legs. See Illust. in Appendix..
Midbrain :: Midbrain (n.) The middle segment of the brain; the mesencephalon. See Brain.
Xanthophane :: Xanthophane (n.) The yellow pigment present in the inner segments of the retina in animals. See Chromophane.
Multisect :: Multisect (a.) Divided into many similar segments; -- said of an insect or myriapod.
Blastomere :: Blastomere (n.) One of the segments first formed by the division of the ovum.
Epipharyngeal :: Epipharyngeal (a.) Pertaining to the segments above the epibranchial in the branchial arches of fishes.
Pronucleus :: Pronucleus (n.) One of the two bodies or nuclei (called male and female pronuclei) which unite to form the first segmentation nucleus of an impregnated ovum.
Manitrunk :: Manitrunk (n.) The anterior segment of the thorax in insects. See Insect.
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