'quark' definitions:

Definition of 'quark'

(from WordNet)
noun
(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"
noun
Fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet [syn: quark cheese, quark]