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n. Abbr. b
The flavor of quark that has a charge of - 1/3 , has a mass about 8,220 times that of an electron, and belongs to the third generation of elementary fermions. Also called beauty quark.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
the quark having electric charge −? times the electron's charge and greater mass than the up, down, charmed, and strange quarks.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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|Noun||1.||bottom quark - a quark with a charge of -1/3 and a mass about 10,000 times that of an electron|
quark - (physics) hypothetical truly fundamental particle in mesons and baryons; there are supposed to be six flavors of quarks (and their antiquarks), which come in pairs; each has an electric charge of +2/3 or -1/3; "quarks have not been observed directly but theoretical predictions based on their existence have been confirmed experimentally"
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