There are 2 main definitions of quark in English:

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quark1

Syllabification: quark
Pronunciation: /kwärk
 
/

noun

Physics
Any of a number of subatomic particles carrying a fractional electric charge, postulated as building blocks of the hadrons. Quarks have not been directly observed, but theoretical predictions based on their existence have been confirmed experimentally.
Example sentences
  • Research into the atom's nucleus has uncovered a variety of subatomic particles, including quarks and gluons.
  • This process results in two jets of hadronic particles as the quarks form hadrons.
  • The scalar superpartners of quarks and electrons are called squarks and selectrons.

Origin

1960s: a word invented by Murray Gell-Mann (see Gell-Mann, Murray). Originally quork, the term was changed by association with the line “Three quarks for Muster Mark” in Joyce's Finnegans Wake (1939).

Definition of quark in:

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There are 2 main definitions of quark in English:

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quark2

Syllabification: quark
Pronunciation: /kwärk
 
/

noun

A type of low-fat curd cheese.
Example sentences
  • Plain or flavored yogurt, quark, cottage cheese, beaten mascarpone or ricotta could be substituted for the fromage blanc.
  • I've never tried quark skimmed milk soft cheese before; won't be trying it again in a hurry.
  • In the morning, I eat oatmeal with egg whites and low-fat quark [a soft creamy cheese popular in Europe].

Origin

1930s: from German Quark 'curds'.

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