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down quark

DEFINITIONS OF: down quark

1

n a stable quark with an electric charge of -1/3 and a mass 607 times that of an electron

Type of:
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
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