cross section


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Related to cross section: Scattering cross section

cross section

also cross-sec·tion (krôs′sĕk′shən, krŏs′-)
n.
1.
a. A section formed by a plane cutting through an object, usually at right angles to an axis.
b. A piece so cut or a graphic representation of such a piece.
2. Physics A quantity, measured in units of barns, used to express the probability of an encounter between particles over a given area in a collision. Also called collision cross section.
3. Statistics A sample meant to be representative of a whole population.
4. Informal A variety; a diversity.

cross′-sec′tion·al adj.

cross section

n
1. (Mathematics) maths a plane surface formed by cutting across a solid, esp perpendicular to its longest axis
2. (Mathematics) 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) surveying a vertical section of a line of ground at right angles to a survey line
6. (General Physics) 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
ˌcross-ˈsectional adj

cross′ sec`tion


n.
1. a section made by a plane cutting something transversely, esp. at right angles to the longest axis.
2. a representative sample showing all characteristic parts, relationships, etc., of the whole.
3. a vertical section of the ground surface taken at right angles to a survey line.
4. Physics. a measure of the probability, expressed as the effective area of a given particle, that one particle will interact with another.
cross′-sec′tion, v.t.
cross′-sec′tional, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.cross section - a section created by a plane cutting a solid perpendicular to its longest axis
profile - a vertical section of the Earth's crust showing the different horizons or layers
plane section, section - (geometry) the area created by a plane cutting through a solid
2.cross section - a sample meant to be representative of a whole population
sample - a small part of something intended as representative of the whole
statistics - a branch of applied mathematics concerned with the collection and interpretation of quantitative data and the use of probability theory to estimate population parameters
3.cross section - (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns
probability, chance - a measure of how likely it is that some event will occur; a number expressing the ratio of favorable cases to the whole number of cases possible; "the probability that an unbiased coin will fall with the head up is 0.5"
atomic physics, nuclear physics, nucleonics - the branch of physics that studies the internal structure of atomic nuclei
Translations
section efficace

cross section

n (Bio) → sezione f trasversale; (of population) → campione m (rappresentativo) (Topography) → profilo trasversale
References in periodicals archive ?
Then, a printhead incorporating one or more inkjet-type nozzles moves across the layer, depositing liquid binder in regions corresponding to the cross section of the part geometry.
In order to calculate the degree of reaction at any point in the tire cross section we use the pressure output of the finite element program.
MRI scanners can combine these cross sections into three-dimensional images of the body's nerve networks.
In this situation, an o-ring with the smallest possible cross section should be used, as well as a rubber compound with low permeability.
The runner cross section is increased to further reduce velocity and allow any inclusions that escaped the sprue filtration to float out of the stream and be trapped along the top of the runner.
The intensity of x rays emitted when an electron beam strikes a sample depends on the energy distribution of the electrons in the solid, the energy variation of the ionization cross section of the relevant subshell, the fraction of ionization events that give x rays in the line of interest and the absorption coefficient of the x rays on the path to the detector.
Figures 4a and 4b provide cross sections of the two risers, which have differing flow rates after four seconds.
2~ laser cuts the outline of the specific cross section that represents one of the thin cross sections within the 3-D object.
This manufacturing process ensures that the profile has a uniform honey-combing over the whole cross section and that the surface is equivalently smooth.
After identifying the lack of a suitable cross section process, SELA's R&D effort proved successful with the development of a system that met the demanding criteria typical of the process -- high accuracy, good quality and true cross-section -- while still maintaining dedicated and affordable equipment" said Colin Smith, President of SELA.
The principal filter types used in foundries are ceramic foam, which exhibit a random pore size distribution, and the extruded cellular ceramic type with straight pores of constant cross section.
This year's Boston conference has a cross section of different categories of content technology vendors, including a large ECM vendor, a mid-tier second generation vendor, a hosted CM vendor, and an infrastructure supplier.