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1. (physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavours 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"
    
2. Fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet
   - quark cheese, curd cheese [Brit]

Derived forms: quarks

Type of: cheese, elementary particle, fundamental particle

Part of: hadron

Encyclopedia: Quark, Strangeness & Charm