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up quark

noun

, Physics.
  1. the quark having electric charge 2/3 times the elementary charge and strangeness and charm equal to 0.


up quark

/ ŭp /

  1. 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.
  2. 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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