a heavy quark having electric charge 2/3 times the elementary charge.
Origin of top quark
First recorded in 1975–80
Also called t quark, truth quark.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
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. See Table at subatomic particle.
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