/ Dictionary / Index P prenuclear: Meaning and Definition of Find definitions for: pre•nu•cle•ar Pronunciation: (prē-n'klē-ur, -ny'- or, by metathesis, -kyu-lur), [key] — adj. of or pertaining to the era before the development of nuclear weapons. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. prentice prenuptial Related Content Daily Word Quiz: gregarious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language