from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun Any subatomic particle, such as one of the fundamental fermions or gauge bosons, that may be a component of other particles but is not made of components itself.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun physics
fundamental particle; any of the subatomic particlesthat does not consist of other, smaller particles; the gauge bosons, leptonsand quarks
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun (physics) a particle that is less complex than an atom; regarded as constituents of all matter
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