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")
quark cheese, quark -- (fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet)
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