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 (ăn′tē-prō′tŏn′, ăn′tī-)
The antiparticle of the proton.


(Atomic Physics) the antiparticle of the proton; a particle having the same mass as the proton but an equal and opposite charge


(ˈæn tiˌproʊ tɒn, ˈæn taɪ-)

the antiparticle of the proton, having negative charge but the mass and spin of the proton.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.antiproton - an unstable negatively charged proton; the antiparticle of a proton
nucleon - a constituent (proton or neutron) of an atomic nucleus
References in periodicals archive ?
Other categories would be (c) a matter atom with where one or more (but not all) of the electrons and/or protons are replaced by antimatter particles of the same corresponding charges, and (d) an antimatter atom such that one or more (but not all) of the antielectrons and/or antiprotons are replaced by matter particles of the same corresponding charges.
By comparing this magnetic property of protons with that of antiprotons, researchers hope to gain insight into why the universe is dominated by matter rather than antimatter.
An unprecedented infrastructure providing cooled precision beams of stable isotopes, antiprotons and radioactive beam for Nuclear-, Atomic-, Astrophysics and high density plasma physics is under construction, opening new fields in research.
London, August 8 (ANI): A thin band of antimatter particles called antiprotons have for the first time been spotted surrounding the earth, with scientists hoping that it could be used to fuel future spacecraft.
Along with electrons and positrons, dark matter annihilation should produce other signals like extra antiprotons, gamma rays and radio waves.
The FAIR (Facility for Antiproton and Ion Research) project aims to build in Darmstadt, Germany, on the site of GSI (Gesellschaft fE-r Schwerionenforschung), an accelerator platform for the production of antiprotons with a beam quality and intensity unmatched to this day.
To form antihydrogen during these sessions, antiprotons were mixed with positrons inside the trap.
An atom of unmatter is formed either by (1): electrons, protons, and antineutrons, or by (2): antielectrons, antiprotons, and neutrons.
FAIR is a new and unique international accelerator facility for research with antiprotons and ions, which will be built in the next few years near Darmstadt in Germany.
Workers are upgrading neutrino-generating equipment in the lab's main injector storage ring- originally built to feed protons and antiprotons into the Tevatron and a major accelerator by itself.
Collisions at 900 GeV have only been measured with protons and antiprotons.
Some Fermilab scientists will spend months, others years, digging through the pile of information left behind: about a million billion recorded collisions between protons and their antimatter counterparts, antiprotons.