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

Tympanohyal :: Tympanohyal (n.) The proximal segment in the hyoidean arch, becoming a part of the styloid process of the temporal bone in adult man..
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..
Branchiate :: Branchiate (a.) Furnished with branchiae; as, branchiate segments..
Alecithal :: Alecithal (a.) Applied to those ova which segment uniformly, and which have little or no food yelk embedded in their protoplasm..
Femur :: Femur (n.) The proximal segment of the hind limb containing the thigh bone; the thigh. See Coxa.
Urite :: Urite (n.) One of the segments of the abdomen or post-abdomen of arthropods.
Metamere :: Metamere (n.) One of successive or homodynamous parts in animals and plants; one of a series of similar parts that follow one another in a vertebrate or articulate animal, as in an earthworm; a segment; a somite. See Illust. of Loeven's larva..
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..
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..
Segment :: Segment (n.) A segment gear.
Rhodophane :: Rhodophane (n.) The red pigment contained in the inner segments of the cones of the retina in animals. See Chromophane.
Multifid :: Multifid (a.) Having many segments; cleft into several parts by linear sinuses; as, a multifid leaf or corolla..
Tripinnatifid :: Tripinnatifid (a.) Thrice pinnately cleft; -- said of a pinnatifid leaf when its segments are pinnatifid, and the subdivisions of these also are pinnatifid..
Meroblastic :: Meroblastic (a.) Consisting only in part of germinal matter; characterized by partial segmentation only; as, meroblastic ova, in which a portion of the yolk only undergoes fission; meroblastic segmentation; -- opposed to holoblastic..
Myriapoda :: Myriapoda (n. pl.) A class, or subclass, of arthropods, related to the hexapod insects, from which they differ in having the body made up of numerous similar segments, nearly all of which bear true jointed legs. They have one pair of antennae, three pairs of mouth organs, and numerous trachaae, similar to those of true insects. The larvae, when first hatched, often have but three pairs of legs. See Centiped, Galleyworm, Milliped..
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..
Scalloped :: Scalloped (a.) Having the edge or border cut or marked with segments of circles. See Scallop, n., 2..
Myotome :: Myotome (n.) A muscular segment; one of the zones into which the muscles of the trunk, especially in fishes, are divided; a myocomma..
Thigh :: Thigh (n.) The proximal segment of the hind limb between the knee and the trunk. See Femur.
Zoonite :: Zoonite (n.) One of the theoretic transverse divisions of any segmented animal.
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