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top quark

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noun Physics.
a heavy quark having electric charge 2/3 times the elementary charge.
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Also called t quark, truth quark.

Origin of top quark

First recorded in 1975–80
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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Scientific definitions for top quark

top quark
[ tŏp ]

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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