/ Dictionary / Index N nuclear power: Meaning and Definition of Find definitions for: nu'clear pow'er Pronunciation: [key] power derived from nuclear energy. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. nuclear physics nuclear radiation 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