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See top quark.
[Arbitrary coinage forming a pair with beauty quark.]
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|Noun||1.||truth quark - a hypothetical quark with a charge of +2/3 and a mass more than 100,000 times that of an electron|
quark - (physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3; "quarks have not been observed directly but theoretical predictions based on their existence have been confirmed experimentally"
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