(physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns | a small part of something intended as representative of the whole |
a sample meant to be representative of a whole population | items selected at random from a population and used to test hypotheses about the population |
a section created by a plane cutting a solid perpendicular to its longest axis | all or part of a natural object that is collected and preserved as an example of its class |