from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A hypothetical quark with a charge of + 2/3 and a mass of 360,000 times that of the electron. See Table at subatomic particle.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A quark having a fractional electric charge of +2/3 and a mass about 178,000 MeV. Symbol: t
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a hypothetical quark with a charge of +2/3 and a mass more than 100,000 times that of an electron
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