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1. Representing a plane made by cutting across something at right angles to its length
   "cross-section views of the neck";
   - cross-sectional

1. A section created by a plane cutting a solid perpendicular to its longest axis
    
2. (statistics) a sample meant to be representative of a whole population
    
3. (physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns

Derived forms: cross sections

See also: crosswise

Type of: chance, plane section, probability, sample, section

Encyclopedia: Cross-section