quark

Noun	1.	quark - 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
	2.	quark - fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet Synonyms: quark cheese

beauty quark, bottom quark, charm quark, down quark, elementary particle, fundamental particle, hadron, squark, strange quark, subatomic particle, top quark, truth quark, up quark