down quark
noun Physics.
the quark having electric charge −1/3 times the elementary charge, with strangeness, charm, and other quark quantum numbers equal to 0.
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Also called d quark.
Origin of down quark
First recorded in 1975–80
Words nearby down quark
Downpatrick, down payment, downpipe, downplay, downpour, down quark, downrange, downrate, downregulation, downrigger, downright
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
Scientific definitions for down quark
down quark
[ doun ]
A quark with a charge of -1/3. Its mass is greater than that of the electron and the up quark, but smaller than that of all the other quarks. See Table at subatomic particle.
The American Heritage® Science Dictionary
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