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Cross section   Listen
noun
cross section  n.  
1.
A flat plane cutting through a three-dimensional object, usually at right angles to the longest axis of the object.
2.
Any visual representation of a cross section 1, showing the internal structure of the object in the plane of the cross section; as, the technician prepared a series of MRI cross sections of the skull. Note: Different cross sections created by different techniques may show different aspects of internal structure. Thus computerized axial tomography using X-rays shows different structures than are visualized by MRI.
3.
A thin slice of an object made by cutting it transversely; as, to view a cross section of a bacterium with an electron microscope after staining the DNA; cross sections were prepared with a microtome.
4.
A representative sample of a complex group; as, the town contained a cross section of the American population.
5.
(Physics) A measure of the probability that a nucleus will interact in a specified way with a bombarding particle, expressed as the effective area that the nucleus presents to the particle; called also nuclear cross section.






Collaborative International Dictionary of English 0.48








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"Cross section" Quotes from Famous Books



... a cross section of the tooth, its appearance and shape will then depend on the portion of the tooth that it represents. From year to year, there is a gradual shortening in the lateral diameter, and an apparent increase in the diameter ...
— Common Diseases of Farm Animals • R. A. Craig, D. V. M.

... text reads 'ingenius'] ingenious device for stretching emery cloth for use in the workshop consists of a couple of strips of wood about 14 in. long, hinged longitudinally, and of round, half-round, triangular, or any other shape in cross section. On the inside faces of the wood strips are pointed studs, fitting into holes on the opposite side. The strip of emery cloth is laid on to one set of the studs, and the file, as it is called, closed, which fixes the strip on one side. It is then similarly ...
— Burroughs' Encyclopaedia of Astounding Facts and Useful Information, 1889 • Barkham Burroughs

... of the frame, inclining toward each other in the form of an A, are secured at their bases to a foundation plate embedded in the masonry. They are hollow, of cast iron, and of rectangular cross section, each leg in two pieces joined midway of their length by flanges and bolts. The legs are also bound together by four plates of wrought iron, which, at the same time, holds the guides. The height of the legs is 10.25 meters, and their weight, with the ...
— Scientific American Supplement, No. 488, May 9, 1885 • Various

... "He's got a screwdriver that he's modified to give it a head with an L-shaped cross section, and he's wiggling it around inside that hole in the box. But what he's doing is a secret between God and the Nipe at this point," Colonel Mannheim ...
— Anything You Can Do ... • Gordon Randall Garrett

... a three-year old male. No sooner was the struggling animal deposited in the bottom of my own boat than it savagely seized the calf of my devoted leg and endeavored to bite therefrom a generous cross section. My leggings and my leech stockings saved my life. That implacable little beast never gave up; and two days later ...
— The Minds and Manners of Wild Animals • William T. Hornaday

... foreign counterpart of our well-known jack-in-the-pulpit, or Indian-turnip, with its purple-streaked canopy, and sleek "preacher" standing erect beneath it. A representation of this arum is shown in Fig. 12, and a cross section at A, ...
— My Studio Neighbors • William Hamilton Gibson

... upon the material in a wrought-iron bridge, from the combined weight of the bridge and load, at 5 tons per square inch of the net section of the metal. The French practice allows 3-8/10 tons per square inch of the cross section of the metal, which, considering the amount taken out by rivet-holes, is substantially the same as the English allowance. The report of the American Society of Civil Engineers, above referred to, recommends 10,000 pounds per inch as the maximum for wrought-iron in ...
— Bridge Disasters in America - The Cause and the Remedy • George L. Vose

... the hub. The other arms (four above and four below the fixed arms) are pivoted to the hub and held spread by chain stays. These eight blades fold, in pairs, to each of the fixed arms. The wheels are shown in elevation, with the upper pivoted arms folded on top of the fixed arms, and in cross section; the latter shows the shape of the buckets, hub, and outboard bearing of the shaft. The wheels are described as being 4.9 meters (16 feet) in diameter, while the buckets are 1.42 meters (4.65 feet) wide and 0.83 meters (2.72 feet) deep. The two outer corners of each ...
— The Pioneer Steamship Savannah: A Study for a Scale Model - United States National Museum Bulletin 228, 1961, pages 61-80 • Howard I. Chapelle

... The cross section of the main dam, in cases where flood water in the spring runs over the dam, should be such that the bottom thickness is about one half the height, and Fig. 40 (after Wegman) shows a suitable cross-section ...
— Rural Hygiene • Henry N. Ogden

... rest of the universe out. The poet (who is almost always a specialist also, a special kind of poet), having selected his specialty, develops it by letting all the universe in. He spends his time in making his life a cross section of the universe. The spirit of the whole of it, something of everything in it, is represented in everything he does. Whatever his specialty may be in poetry, painting, or literature, he produces an eternal result by massing the infinite ...
— The Lost Art of Reading • Gerald Stanley Lee

... skull with open jaws is firmly fixed on end of neck board. Fasten neck board in vise and mark where to saw off, allowing for a piece of 1/2 inch board shaped like a cross section of the neck. If an artificial form is used, screw it to the neck board and treat ...
— Home Taxidermy for Pleasure and Profit • Albert B. Farnham

... photomicrographs of cross sections of a jute plant. The lower illustration represents approximately one quarter of a complete cross section. The central part of the stem or pith is lettered A; the next wide ring B is the woody matter; the outer covering or cuticle is marked C; while the actual fibrous layer appears between the parts B and C, and some ...
— The Jute Industry: From Seed to Finished Cloth • T. Woodhouse and P. Kilgour

... of the questions we asked the scientists had to be answered by personal opinions because the exact answers didn't exist. When such questions came up, about all we could do was to try to get the largest and most representative cross section of personal opinions upon which to base our decisions. In this category of questions probably the most frequently discussed was the possibility that other celestial bodies in the universe were populated with intelligent beings. The exact ...
— The Report on Unidentified Flying Objects • Edward Ruppelt

... marbled appearance. In the same way bronchopneumonia may vary as to the parts of the lung affected, the extent of the lesions, the degree and kind of pathological changes in the interlobular tissue, the color of the lung on cross section and the amount of hepatization. In individual cases, therefore, it is often necessary to take into account the history of the animal, the course of the disease, and the communicability of the affection before a diagnosis can be made between ...
— Special Report on Diseases of Cattle • U.S. Department of Agriculture



Words linked to "Cross section" :   nucleonics, statistics, profile, plane section, atomic physics, nuclear physics, cross-sectional, probability, section, chance, sample



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