# cross section

(redirected from cross-sectional)
Also found in: Dictionary, Thesaurus, Medical, Legal, Financial, Wikipedia.
Related to cross-sectional: Cross-Sectional Area, Cross-sectional analysis, Cross-sectional data

## cross section

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. 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 Section

in hydraulics, the cross section of a liquid stream (in a pipeline, channel, or river) perpendicular to the direction of the flow velocity. If the liquid motion is continuously changing, the cross section is taken as flat and equal to the cross section area of the flow.

## cross section

[′krȯs ‚sek·shən]
(geology)
A diagram or drawing that shows the downward projection of surficial geology along a vertical plane, for example, a portion of a stream bed drawn at right angles to the mean direction of the flow of the stream.
An actual exposure or cut which reveals geological features.
(graphic arts)
A diagram or drawing representing a cut at right angles to an axis.
(mapping)
A horizontal grid system that is laid out on the ground for determining contours, quantities of earthwork, and so on, by means of elevations of the grid points.
(mathematics)
The intersection of an n-dimensional geometric figure in some euclidean space with a lower dimensional hyperplane.
A right inverse for the projection of a fiber bundle.
(physics)
An area characteristic of a collision reaction between atomic or nuclear particles or systems, such that the number of reactions which occur equals the product of the number of target particles or systems and the number of incident particles or systems which would pass through this area if their velocities were perpendicular to it. Also known as collision cross section.

## cross section

A representation of a building, or portion thereof, drawn as if it were cut vertically to show its interior; often taken at right angles to the longitudinal axis of the building.
References in periodicals archive ?
Using a coagulation bath of 45-49% solvent and coagulation bath temperatures ranging from 10 to 70[degrees]C, the fiber cross-sectional shape is best described as nonuniform or unsymmetrical at coagulation bath temperatures of 10[degrees]C, oval at 45[degrees]C, and nearly circular at 70[degrees]C.
The effective cross-sectional area of this via is [pi] ([r.
During inspiration, air flows through the trachea which has a cross-sectional area ranging from 3.
This location was the most proximal position in the thigh where the whole cross-sectional image of the rectus femoris lay within the field of view of both transducers in all subjects.
One limitation of this and other cross-sectional studies is that urinary BPA concentrations vary widely throughout the day, so a given sample is likely to reflect exposure only over the previous 4-6 hours.
The variations in flow field, cylinder displacement, exhaust time, cooling capacity, and cooling capacity per unit cross-sectional area of the cylinder are analyzed under the corresponding operational conditions.
This cross-sectional area can be refined further by modifying it with known design constraints.
To investigate the association between acne and mental distress and to explore any influence of dietary factors on this, researchers conducted a population-based cross-sectional study of 3775 18- or 19-year-olds.
They suggested that cross-sectional surveys, using oral fluid specimens and satellite images for sampling could be useful in identifying the optimal timing of repeat vaccination campaigns "before large outbreaks of measles occur.
Usage patterns, health, and nutritional status of long-term multiple dietary supplement users: a cross-sectional study.
Preadolescents and adolescents who are enrolled in Medicaid and seek reproductive health services have an elevated likelihood of being abused or engaging in criminal behavior, both before and after their reproductive health visits, according to a recent cross-sectional analysis of Alaskan public health databases.

Site: Follow: Share:
Open / Close