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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



... 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 ...
— The Automobile Storage Battery - Its Care And Repair • O. A. Witte
... the air. These always burst on percussion. The constant noise of our own guns is really worse on the nerves than the shell; there is the deafening noise, and the constant whirr of shells going overhead. The earth shakes with every nearby gun and every close shell. I think I may safely enclose a cross section of our position. The left is the front: a slope down of 20 feet in 100 yards to the canal, a high row of trees on each bank, then a short 40 yards slope up to the summit of the trench, where the brain of the outfit was; then a telephone wired ...
— In Flanders Fields and Other Poems - With an Essay in Character, by Sir Andrew Macphail • John McCrae


Words linked to "Cross section" :   atomic physics, nucleonics, section, nuclear physics, statistics, plane section, profile, chance


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