zero-point energy[zîrˈō-pointˌ, zēˈrō-]
zero-point energy definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The irreducible minimum energy possessed by a substance at absolute zero temperature.
zero-point energy - Science Definition
The irreducible minimum energy possessed by a physical system, as of a substance at a temperature of absolute zero. The zero point energy of a vacuum is not zero due to vacuum fluctuations. See Note at absolute zero.