# mass-energy equivalence

Also found in: Thesaurus, Wikipedia.

Related to mass-energy equivalence: E=mc2

## mass-en·er·gy equivalence

(măs′ĕn′ər-jē)*n.*

The physical principle that a measured quantity of energy is equivalent to a measured quantity of mass. The equivalence is expressed by Einstein's equation

*E = mc*^{2}, where*E*represents energy,*m*the equivalent mass, and*c*the speed of light.## mass-energy equivalence

The principle that mass and energy can be converted into each other and that a particular quantity of mass is equivalent to a particular quantity of energy. The principle was stated mathematically by Albert Einstein as

*E*=*mc*^{2}, where*E*is the energy in ergs,*m*is the mass in grams, and*c*is the speed of light in centimeters per second.ThesaurusAntonymsRelated WordsSynonyms

**Legend:**Switch to new thesaurus

Noun | 1. | mass-energy equivalence - (physics) the principle that a measured quantity of mass is equivalent (according to relativity theory) to a measured quantity of energyprinciple, rule - a rule or law concerning a natural phenomenon or the function of a complex system; "the principle of the conservation of mass"; "the principle of jet propulsion"; "the right-hand rule for inductive fields" natural philosophy, physics - the science of matter and energy and their interactions; "his favorite subject was physics" |

Want to thank TFD for its existence? Tell a friend about us, add a link to this page, or visit the webmaster's page for free fun content.

Link to this page: