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Cross section   /krɔs sˈɛkʃən/   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.



verb
cross section  v. t.  To create one or a series of cross sections 3 by cutting (an object) into thin slices.






Collaborative International Dictionary of English 0.48








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"Cross section" Quotes from Famous Books



... hardens the 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 ...
— Home Taxidermy for Pleasure and Profit • Albert B. Farnham

... Exterior Cross Section In connection with Otto Luhr Consulting Engineer & Herman Fridel Architect Ice Making System Patent ...
— Manufacturing Cost Data on Artificial Ice • Otto Luhr

... will furnish a safe and stable foundation." Subsequent new borings, conducted by the present Commission, have fully confirmed this verdict. They show that the locks will rest on rock for their entire length. The cross section of the dam and method of construction will be such as to insure against any slip or sloughing off. Similar examination of the foundations of the locks and dams on the Pacific side are in progress. I believe that the locks should be made of a ...
— State of the Union Addresses of Theodore Roosevelt • Theodore Roosevelt

... oblige me by looking with a strong lens at the bit of comb, brushing off with a knife the upper thickened edges, and then compare, by eye alone, the thickness of the walls there with the thickness of the basal plates, as seen in any cross section. I should very much like to hear whether, even in this way, the difference is not perceptible. It is generally thus perceptible by comparing the thickness of the walls of the hexagon (if not taken very close ...
— More Letters of Charles Darwin - Volume I (of II) • Charles Darwin

... every point of the thickness of the cylinder they have common resultants acting in various directions. Thus, if we call t the internal stress existing at a distance rx from the axis of the cylinder, and in a direction tangential to its cross section, and T the additional stress due to pressure inside the cylinder acting at the same point and in the same direction, then the newly developed stress ...
— Scientific American Supplement, No. 633, February 18, 1888 • Various

... illustrates 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 of the fibres are indicated by D. The arrows show the corresponding parts in the ...
— The Jute Industry: From Seed to Finished Cloth • T. Woodhouse and P. Kilgour

... 1,800 pounds to the linear foot. The wind pressure calculated at the rate of 30 lbs. to the square foot is enormous and is provided for by deep wall girders and knee braces which transfer the strain to the columns and to the foundation. The average cross section of the tower is 75 by 85 feet, the floor space of the entire building is 1,080,000 square ...
— Marvels of Modern Science • Paul Severing

... cast) are built in a mass of brickwork sunk in the ground below the level of the floor, such pits in cross-section being made slightly larger than that of the ingot, just enough to allow for any fins at the bottom, and somewhat deeper than the longest ingot likely to be used. In practice the cross section of the pit is made about 3 in. larger than the large end of the ingot, and the top of the ingot may be anything from 6 in. to 18 in. below the top of the pit. These pits are commanded by an ingot ...
— Scientific American Supplement No. 360, November 25, 1882 • Various

... fixes the greatest strain that shall come 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 ...
— Bridge Disasters in America - The Cause and the Remedy • George L. Vose

... 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 of the fibres ...
— The Jute Industry: From Seed to Finished Cloth • T. Woodhouse and P. Kilgour



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