Definition for the word Quark.
fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet(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
Is Quark a Valid Scrabble Word?
Yes Quark is a valid Scrabble word.
Scrabble Point Value of Quark: 18 Points