Definition of "antiproton" [antiproton]

• The antiparticle of the proton. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "Antihydrogen is identical, except that it has a negatively charged proton, called an antiproton, and a positively charged electron, called a positron."
• "To commenter "antiproton": I am well researched on telomeres, telomerase and their role in both cancer and stem cells."
• "Among his research papers one finds included, the discovery of neutral pions in cosmic rays (together with J. Hooper and D.T. King at Bristol University, England) and the first systematic study of antiproton annihilations (together with research groups at the University of California, Berkeley, USA)."