cross section | |
—n | |
1. | maths a plane surface formed by cutting across a solid, esp perpendicular to its longest axis |
2. | a section cut off in this way |
3. | the act of cutting anything in this way |
4. | a random selection or sample, esp one regarded as representative: a cross section of the public |
5. | surveying a vertical section of a line of ground at right angles to a survey line |
6. | physics a measure of the probability that a collision process will result in a particular reaction. It is expressed by the effective area that one participant presents as a target for the other |
cross-'sectional | |
—adj |
cross section
In particle physics, an expression of the probability of the occurrence of an event, typically the scattering of subatomic particles, over a given area. |