plural of center of mass

(physics) The portion of an isotope shift produced by the changing mass of a nucleus upon the addition of a neutron

plural of mass shift

Used other than figuratively or idiomatically: see mass, destruction. / (uncountable, idiomatic) Killing of large numbers of people.

The net movement of material matter from one location to another.

(physics) Mass and energy as a unified concept. / (also spelled mass energy) The energy associated with any given mass according to special relativity, E = mc².

mass-to-energy

(physics) A mass of fissile material that is more than sufficient to sustain a nuclear chain reaction

(physics) A mass of fissile material that is insufficient to sustain a nuclear chain reaction.

Third-person singular simple present indicative form of mass-produce