mass action mass • mass card · · · Info · Definitions · Synonyms · Characters · · mass action · · Text Common · · Latin · · Scripts 11 · · Length 3 · · Syllables Definitions · · · (noun) (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. Synonyms: mass-action principle, mass action. · · Noun Definition 1 Synonyms · · · mass-action principle · · Synonym 1 Characters · · space U+0020 a latin small letter a U+0061 c latin small letter c U+0063 i latin small letter i U+0069 m latin small letter m U+006D n latin small letter n U+006E o latin small letter o U+006F s latin small letter s U+0073 t latin small letter t U+0074