from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun An electron or positron, especially one emitted at high energy in the decay of certain radioactive nuclei.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics An energetic
electronor positronproduced as the result of a nuclear reactionor nuclear decay.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a high-speed electron or positron emitted in the decay of a radioactive isotope
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