massˈiveness noun

massˈy adjective

Massive, made up of masses

mass defect noun

The difference between the sum of the masses of the neutrons and protons in a nucleus and the mass of the nucleus itself

mass-energy equivalence noun (physics)

The fundamental principle that mass and energy are equivalent and interconvertible shown by the mass-energy equation E=mc²

mass market noun

The market for mass-produced goods

mass-marˈket transitive verb

mass-marˈketing noun

mass media, mass medium see under medium

mass meeting noun

A large meeting for a public protest or discussion

mass noun noun

A noun that denotes something that cannot be counted or made plural

mass number noun

The atomic weight of an isotope, the number of nucleons in the nucleus

mass observation noun

The study of the habits, opinions, etc of the general body of a community

mass-produceˈ transitive verb

To produce in great quantity by a standardized process

mass-producedˈ adjective

mass producer noun

mass production noun

mass radiography noun

The X-raying of large numbers of people by means of mobile units

mass spectrograph noun

A vacuum system in which positive rays of various charged atoms are deflected through electric and magnetic fields so as to indicate the charge-to-mass ratios on a photographic plate, thus measuring the atomic masses of isotopes with precision

mass spectrometer noun

An instrument like the mass spectrograph that detects the charged particles electrically instead of photographically

mass spectrometry noun

mass transit noun (US)

Public transport

mass-transit adjective

in mass

1. As a body
2. All together

in the mass

1. In the aggregate
2. As a whole
3. Indiscriminately

law of mass action (chem)

The law stating that the rate of chemical change is proportional to the product of the concentrations of the reacting substances