cross-section

名词 cross-section:

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

形容词 cross-section:

1. representing a plane made by cutting across something at right angles to its length
   同义词：cross-sectional