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rest energy

noun, Physics.
the energy equivalent to the mass of a particle at rest in an inertial frame of reference, equal to the rest mass times the square of the speed of light.
1935-40 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for rest energy
  • The upper limit on the rest energy of a photon is rather low.
  • If you are colliding electrons and positrons, then yes, all of your equations involve total energy and rest energy of the matter.
rest energy in Science
rest energy
In Special Relativity, the energy corresponding to the rest mass of a body, equal to the rest mass multiplied by the speed of light squared. See more at mass-energy equivalence.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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