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n. (used with a sing. verb)
Any of various statistical models used in physics, as in kinetic theory, to describe the aggregate properties of large numbers of particles.
(General Physics) (functioning as singular) the study of the properties of physical systems as predicted by the statistical behaviour of their constituent particles
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|Noun||1.||statistical mechanics - the branch of physics that makes theoretical predictions about the behavior of macroscopic systems on the basis of statistical laws governing its component particles|