What does "mass energy" mean?

The energy present in an object because of its mass

Mass energy

Common synonyms include: energy content, energy from mass, intrinsic energy, mass conversion, mass dependent energy, mass-energy.

noun

noun ·Rare ·Advanced level

Noun

1
The energy present in an object because of its mass
"Even a minuscule quantity of matter contains an incredible amount of mass energy."
2
(physics) the mass of a body regarded relativistically as energy wordnet

"Even a minuscule quantity of matter contains an incredible amount of mass energy."