+A **quark** is an elementary particle and a fundamental constituent of [matter](/wiki/matter). These tiny building blocks combine to form [hadrons](/wiki/hadron), such as protons and neutrons, held together by the strong nuclear force.
+## See also
+- [Proton](/wiki/proton)
+- [Neutron](/wiki/neutron)
+- [Lepton](/wiki/lepton)
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