| | | noun | 1. (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. |
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 |  | | "During the 20th century, scientists discovered the proton, electron, neutron, and quark." |
| | | "The physics professor's research was devoted to observations of the quark." |
| | | "An ordinary microscope is nowhere near powerful enough to show you a quark." |
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 | | English, 1960s |
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 | | The building block of theoretical physics is the quark, which is a type of particle and a fundamental component of matter. We won't attempt to explain how quarks work, but we can give a little insight into the name. ... | | Continue Reading |
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