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

  • n. The state of least possible energy in a physical system, as of elementary particles. Also called ground level.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. the stationary state of lowest energy of a particle or system of particles

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

  • n. (physics) the lowest energy state of an atom or other particle


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