Definition of "antiquark" [antiquark]

• The antiparticle of a quark. (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.

• "There they can switch identities time and time again, becoming another quark or an antiquark."
• "The tracing is of the overall occillation frequency … NOT a profile of overall quark/antiquark occillation behavior."
• "CDF physicists have previously measured the rate of the matter-antimatter transitions for the B_s meson, which consists of the heavy bottom quark bound by the strong nuclear interaction to a strange antiquark."