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From Longman Dictionary of Contemporary English
Related topics: Physics
quarkquark /kwɑːk, kwɔːk $ kwɔːrk, kwɑːrk/ noun [countable]  technicalHP a very small part of something, which is smaller than an atom
Examples from the Corpus
quarkWhat happens is that a matter particle, such as an electron or a quark, emits a force-carrying particle.Some fromagefrais and quark have a longer shelf life and may be kept for a week or ten days after purchase.This means that gluons for some reason produce jets that are more spread out than the ones that originate from quarks.If the world had been created without the exclusion principle, quarks would not form separate, well-defined protons and neutrons.This was the point of explaining cars in terms of carburettors rather than quarks.Stir in the quark to thicken the sauce.Each generation has four members: two quarks, an electron-like particle and a neutrino.A proton contains two up quarks and one down quark; a neutron contains two down and one up.
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