isospin[ī′sō spin′, -sə-]
isospin definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
Particle Physics a quantum number used to distinguish the various states of electrical charge of a subatomic particle
isospin definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
noun Abbr. I
A quantum number related to the number of charge states of a baryon or meson.
Origin: iso(topic) + spin.
isospin - Science Definition
A vector quantity of quantum systems (especially subatomic particles) that is conserved in strong interactions and is used to characterize particles that are affected equally by the strong force but have other dissimilar properties, such as different electric charges. For example, protons and neutrons, which are indistinguishable with respect to strong force interactions, have the same isospin. Also called isotopic spin. See also baryon number, strangeness.