from
WordNet (r) 3.0 (2006)
quark
n 1: (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"
2: fresh unripened cheese of a smooth texture made from
pasteurized milk, a starter, and rennet [syn: {quark cheese},
{quark}]