down quark


nounPhysics.
  1. the quark having electric charge −1/3 times the elementary charge, with strangeness, charm, and other quark quantum numbers equal to 0.

Origin of down quark

1
First recorded in 1975–80
  • Also called d quark.

Words Nearby down quark

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2024

How to use down quark in a sentence

Scientific definitions for down quark

down quark

[ doun ]


  1. 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 Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.