antiparticle

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an·ti·par·ti·cle

 (ăn′tē-pär′tĭ-kəl, ăn′tī-)
n.
A subatomic particle, such as a positron or antiproton, having the same spin, magnitude of electric charge, magnitude of magnetic moment, mass, and mean lifetime as the particle to which it corresponds, but the opposite sign of charge, opposite direction of magnetic moment, and opposite intrinsic parity.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

antiparticle

(ˈæntɪˌpɑːtɪkəl)
n
(Atomic Physics) any of a group of elementary particles that have the same mass and spin as their corresponding particle but have opposite values for all other nonzero quantum numbers. When a particle collides with its antiparticle, mutual annihilation occurs
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

an•ti•par•ti•cle

(ˈæn tiˌpɑr tɪ kəl, ˈæn taɪ-)

n.
a particle whose properties are identical in magnitude to those of a specific elementary particle but are of opposite sign.
[1930–35]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.

an·ti·par·ti·cle

(ăn′tē-pär′tĭ-kəl, ăn′tī-pär′tĭ-kəl)
A particle of antimatter that corresponds to an electron or proton but has an opposite charge.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antiparticle - a particle that has the same mass as another particle but has opposite values for its other properties; interaction of a particle and its antiparticle results in annihilation and the production of radiant energy
elementary particle, fundamental particle - (physics) a particle that is less complex than an atom; regarded as constituents of all matter
antimatter - matter consisting of elementary particles that are the antiparticles of those making up normal substances
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
Translations
References in periodicals archive ?
"[A key] discovery would be that of a nucleus of some heavier antielement such as helium [with] two antiprotons and two antineutrons.