| MAS | a noun that does not form plurals |
|---|---|
| MAS | the sum of the number of neutrons and protons in an atomic nucleus |
| MAS | an urban public transit system using underground or elevated trains |
| MAS | a mass spectrometer that produces a graphical representation of the mass spectrum |
| MAS | spectroscope for obtaining a mass spectrum by deflecting ions into a thin slit and measuring the ion current with an electrometer |
| MAS | relating to or involving mass spectroscopy |
| MAS | the use of spectroscopy to determine the masses of small electrically charged particles |
| MAS | a unit of measurement for mass |
| MAS | (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 |
| MAS | produce on a large scale |
| MAS | produced in quantity often by assembly-line techniques |
| MAS | relating to or involving a mass spectrometer |