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WORDNET DICTIONARY
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WORDNET DICTIONARY
Noun cross section has 3 senses
- cross section(n = noun.location) - a section created by a plane cutting a solid perpendicular to its longest axis; has particulars: profile
- cross section(n = noun.cognition) - a sample meant to be representative of a whole population; is a kind of sample
- cross section(n = noun.attribute) - (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns; is a kind of chance, probability
is a kind of plane section, section
Derived form adjective cross-sectional2
Derived form adjective cross-sectional1
CIDE DICTIONARY
cross section, n.
- a flat plane cutting through a three-dimensional object, usually at right angles to the longest axis of the object. [PJC]
- 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."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." [PJC] - 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. [PJC]
- a representative sample of a complex group; as, the town contained a cross section of the American population. [PJC]
- 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 . [PJC]
cross section, v. t.
to create one or a series of cross sections{3} by cutting (an object) into thin slices. [PJC]