/ Dictionary / Index N nuclear magneton: Meaning and Definition of Find definitions for: nu'clear mag'neton Pronunciation: [key] — Physics. Physics. a unit of magnetic moment, used to measure proton spin and approximately equal to Bohr magneton. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nuclear magnetic resonance nuclear medicine Related Content Daily Word Quiz: mamba Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language