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top quark

noun

, Physics.
  1. a heavy quark having electric charge 2/3 times the elementary charge.


top quark

/ tŏp /

  1. A quark with a charge of +2/3. Its mass is larger than that of all the other quarks and is about 360,000 times that of the electron.
  2. See Table at subatomic particle


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Word History and Origins

Origin of top quark1

First recorded in 1975–80

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