| NOUN | cognition | mass-energy equivalence | (physics) the principle that a measured quantity of mass is equivalent (according to relativity theory) to a measured quantity of energy |
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| Meaning | (physics) the principle that a measured quantity of mass is equivalent (according to relativity theory) to a measured quantity of energy. | |
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| Category | physics, natural philosophy | The science of matter and energy and their interactions |
| Broader | principle, rule | A rule or law concerning a natural phenomenon or the function of a complex system |
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