| mass | (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 |
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| mass | the culture that is widely disseminated via the mass media |
| mass | the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles |
| mass | the amount by which the mass of an atomic nucleus is less than the sum of the masses of its constituent particles |
| mass | transmissions that are disseminated widely to the public |
| mass | a large gathering of people intended to arouse enthusiasm |
| mass | the savage and excessive killing of many people |
| mass | a noun that does not form plurals |
| mass | the sum of the number of neutrons and protons in an atomic nucleus |
| mass | an urban public transit system using underground or elevated trains |
| mass | a mass spectrometer that produces a graphical representation of the mass spectrum |
| mass | spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer |