DEFINITIONS
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vacuum energy

Background energy in a vacuum associated with constant vacuum fluctuations. Some astronomers believe vacuum energy to be the source of energy for the apparent acceleration of the expansion of the universe.

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Words nearby vacuum energy

vacuum cleaner, vacuum coffee maker, vacuum concrete, vacuum distillation, vacuum drying, vacuum energy, vacuum flask, vacuum fluctuation, vacuum forming, vacuum frame, vacuum gauge
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.