What is quark?

  • (noun): 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.
    See also — Additional definitions below


A quark ( /ˈkwɔrk/ or /ˈkwɑrk/) is an elementary particle and a fundamental constituent of matter. Quarks combine to form composite particles called hadrons, the most stable of which are protons and neutrons, the components of atomic nuclei. Due to a phenomenon known as color confinement, quarks are never directly observed or found in isolation; they can be found only within baryons or mesons. For this reason, much of what is known about quarks has been drawn from observations of the hadrons themselves.

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Some articles on quark:

Stop Squark
... In particle physics, a stop squark is the superpartner of the top quark as predicted by supersymmetry ... While the top quark is the heaviest known quark, the stop squark is actually often the lightest squark in many supersymmetry models ...
A Lord From Planet Earth - Technological Inventions - Quark Bomb
... The size of a soccer ball, the quark bomb is capable of destroying an entire planet, initiating subatomic fission ... There is no known defense from a quark bomb (see also Strangelet) ... The quark bomb explodes at the moment of construction at the factory ...
Cosmic Banditos
... Quark is a down-on-his-luck pot smuggler hiding out in the mountains of Colombia with his dog, High Pockets, and a small band of banditos led by the irascible José ... Quark narrating one taking place in the present, high up in the mountains of Colombia and the other taking place in the past Mr ... Quark's adventurous account of pot-smuggling voyages on his ship, the Don Juan ...
Theta Meson
... a flavourless meson) formed by a top quark and top antiquark ... Due to the top quark's shortlifetime, the theta meson is not expected to be observed in nature ...

More definitions of "quark":

  • (noun): Fresh unripened cheese of a smooth texture made from pasteurized milk, a starter, and rennet.
    Synonyms: quark cheese