up quark
Noun
-
A stable quark with an electric charge of +2/3 and a mass 607 times that of an electron (synset 109490173)
is a 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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