/ Dictionary / Index N nuclear isomerism: Meaning and Definition of Find definitions for: nu'clear isom'erism Pronunciation: [key] — Physics. Physics. isomerism (def. 2). Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nuclear isomer nuclearize Related Content Daily Word Quiz: deleterious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language