from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The energy equivalent of the rest mass of a body, equal to the rest mass multiplied by the speed of light squared.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The energy of the mass component of a body at rest; equal to the product its rest mass and the square of the speed of light

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. 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


Sorry, no etymologies found.


    Sorry, no example sentences found.


Log in or sign up to get involved in the conversation. It's quick and easy.