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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



... 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 crane, by preference so placed in relation to the blooming mill that the crane also commands the live ...
— Scientific American Supplement No. 360, November 25, 1882 • Various

... enormous corner pinnacles, seems to overweight the tower, and as each side of the parapet is longer than the side of the tower below, the feeling of top-heaviness is increased. The central tower has no buttresses, but the western has an octagonal buttress at each corner, and these decrease in cross section at each of four string courses; so that this tower seems to taper, and by contrast makes the central tower seem to bulge out at the top more than ...
— Bell's Cathedrals: Wimborne Minster and Christchurch Priory • Thomas Perkins

... in the wild arum of Great Britain—the "lords and ladies" of the village lanes, the 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 ...
— My Studio Neighbors • William Hamilton Gibson

... hope soon to be able to give details of them. Reservoirs (Fig. 6) holding water at high pressure must be placed at intervals, and the pipe, T, carrying high pressure water must run the whole length of the line. Fig. 6 shows a cross section of the rail and carriage, and gives a good idea of the general arrangements. The absence of wheels and of greasing and lubricating arrangements will alone effect a very great saving, as we are informed that on the Lyons Railway, which is 800 kilometers long, the cost ...
— Scientific American Supplement, No. 717, September 28, 1889 • Various

... proper condition for dialysis. Furthermore, the structure of the intestine is such as to produce conditions adapted for dialysis. This can be understood from Fig. 3, which represents diagrammatically a cross section through the intestinal wall. Within the intestinal wall, at A, is the food mass in solution. At B are shown little projections of the intestinal wall, called villi extending into this food and covered by a membrane. ...
— The Story of the Living Machine • H. W. Conn

... not drill too deep. Make each hole just deep enough so that the connector will come off easily. Fig. 192 shows a cross section of a post and connector drilled to the proper depth. Notice that you need not drill down the whole depth of the connector, because the bottom part is not burned to ...
— The Automobile Storage Battery - Its Care And Repair • O. A. Witte

... to the above mentioned strains varies as the area of the cross section; so that by doubling the area we double the strength. Any material will bear a much greater strain for a short time than for a long one. The working strength of materials, or the weight which does not injure them enough, to render them unsafe, ...
— Instructions on Modern American Bridge Building • G. B. N. Tower

... Cross Section View, showing how the frame of the Cluthe Truss doesn't press against the body at any point. The Cluthe Truss comes in contact with the body only at the rupture opening (where the Holding Pads support the rupture)— and at the rear, where the Suction Pads rest ...
— Cluthe's Advice to the Ruptured • Chas. Cluthe & Sons

... four frames which are to carry the drawers. They should measure from outside to outside, in length 17-1/2 in.; in width, 12-1/2 in. It is intended that the short pieces shall be tenoned into the long ones. When these frames are ready, cut out each corner as indicated in the cross section drawing. Reduce to size the drawer guides and fasten them in place. Dowel the frames to the ends of the dresser in the places indicated on the drawing. Put on the back, nailing into frames to the ends of the dresser in ...
— Mission Furniture - How to Make It, Part 2 • H. H. Windsor

... 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 feet ...
— Marvels of Modern Science • Paul Severing

... with the former in such a manner that at 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 will be t ...
— Scientific American Supplement, No. 633, February 18, 1888 • Various

... consisted essentially of two recording devices—an ordinary phonograph, and a recorder of the Hensen type writing on a rotary glass disc (see Fig. 5, Plate X.). Of the phonograph nothing need be said. The Hensen recorder, seen in cross section in Fig. 3, was of the simplest type. A diaphragm box of the sort formerly used in the phonograph was modified for the purpose. The diaphragm was of glass, thin rubber, or goldbeater's skin. The stylus was attached perpendicularly to the surface of the diaphragm at ...
— Harvard Psychological Studies, Volume 1 • Various

... breach. Two of the men cried out, gurgled, fell on their faces, and turned over on their backs, struggling; then they lay still. Dan carried them to the deck, and returned with a sailor. The two had just gained the sugar sacks when the centre bulkhead quivered. A cross section collapsed into a V. A score of rivet holes yawned wide and red-hot bolts fell on the sacks and set them on fire. A line of plating, separating from its fellows, sagged open in a red grin and gave view of ...
— Dan Merrithew • Lawrence Perry

... an inch diameter will pierce a plate an inch thick. Now it is well known, that the strain required to punch a piece of metal out of a plate, is just the same as that required to tear asunder a bar of iron of the same area of cross section as the area of the surface cut. The area of the surface cut in this case will be the circumference of the punch, 3.1416 inches, multiplied by the thickness of the plate, 1 inch, which makes the area of the cut surface 3.1416 square inches. The area of the point ...
— A Catechism of the Steam Engine • John Bourne

... canal. For ordinary work, however, secretion in the bronchus is best removed by sponge-pumping (Q.V.) which at the same time cleans the lamp. The drainage bronchoscope may be used in any case in which the very slightly-greater area of cross section is no disadvantage; but in children the added bulk is usually objectionable, and in cases of recent ...
— Bronchoscopy and Esophagoscopy - A Manual of Peroral Endoscopy and Laryngeal Surgery • Chevalier Jackson

... at a proper conception of the nature of a juvenile offender by merely studying a cross section of him at any given moment of his life. In order to understand man, especially abnormal man, we must study him in a longitudinal section; we must note his mode of reaction to experiences in everyday life, under all manner of conditions and circumstances; we must investigate the motives and desires ...
— Studies in Forensic Psychiatry • Bernard Glueck

... such saturation as to cause heaving during frost. This condition may be secured by a suitable draining of the ground immediately under the walk, and by the use of a well-compacted and tightly-bound surface covering of such form as to shed or turn away rain-water. Figure 1 (p. 31) shows the cross section of a foot-path six feet wide on slightly sloping ground, where we have to apprehend an oozing of subsoil water from the land at the highest side. The centre of the walk is slightly crowning,—say ...
— Village Improvements and Farm Villages • George E. Waring

... tombstone. Several other shells had struck the churchyard and one of them had landed on the final resting place of the family of Roger La Porte. The massive marble slab which had sealed the top of the sunken vault had been heaved aside and one wall was shattered, leaving open to the gaze a cross section view of eight heavy caskets lying ...
— "And they thought we wouldn't fight" • Floyd Gibbons

... transparent in its structure, each individual cotton fibre losing its ribbon-like appearance, and assuming a rod-like form, the central canal being more or less obliterated. This is shown in Fig. 2 and 2A, where the fibre is shown as a rod and the cross section in Fig. 2A has no central canal. The action which takes place is as follows: The cellulose enters into a combination with the alkali and there is formed a sodium cellulose, which has the formula C{6}H{10}O{5}2NaOH. This alkali cellulose, ...
— The Dyeing of Cotton Fabrics - A Practical Handbook for the Dyer and Student • Franklin Beech

... by our friend Mr. Shedd, shows the pipe-layer in use. The cross section of the land, shown in front, represents it as having had the advantage of draining, by which the water-table is brought to a level with the bottom of the drain, as shown by the heavy shading. An "Irish spade" and a pipe-layer are shown ...
— Farm drainage • Henry Flagg French



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



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