isotopic spin: Meaning and Definition of

i'sotop'ic spin'

Pronunciation: [key]
— Physics. Physics.
  1. a quantum number that is related to the number of different values of electric charge that a given kind of baryon or meson may have. Symbol: I&hasp; Also calledi
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.