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up quark
noun
, Physics.
- the quark having electric charge 2/3 times the elementary charge and strangeness and charm equal to 0.
up quark
/ ŭp /
- A quark with a charge of +2/3. Its mass is approximately 10 times the electron mass and is the least mass of all quarks.
- See Table at subatomic particle
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Word History and Origins
Origin of up quark1
First recorded in 1975–80
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