mass-action principle(n = noun.cognition) mass action - (neurology) the principle that the cortex of the brain operates as a coordinated system with large masses of neural tissue involved in all complex functioning;
is a kind of principle, rule

accounting principle, archimedes' principle, basic principle, bitter principle, exclusion principle, first principle, fundamental principle, gestalt principle of organization, guiding principle, huygens' principle of superposition, in principle, indeterminacy principle, judicial principle, le chatelier principle, le chatelier's principle, le chatelier-braun principle, legal principle, life principle, localisation principle, localization principle, moral principle, pauli exclusion principle, pleasure principle, pleasure-pain principle, pleasure-unpleasure principle, principle, principle of equivalence, principle of liquid displacement, principle of parsimony, principle of relativity, principle of superposition, reality principle, superposition principle, uncertainty principle, vital principle, working principle