/ Dictionary / Index P pronuclear: Meaning and Definition of Find definitions for: pro•nu•cle•ar Pronunciation: (prō-n'klē-ur, -ny'- or, by metathesis, -kyu-lur), [key] — adj. advocating the building or use of nuclear power plants. advocating the building, stockpiling, or use of nuclear weapons. pro•nu•cle•ar Pronunciation: (prō-n'klē-ur, -ny'- or, by metathesis, -kyu-lur), [key] — adj. Cell Biol. of or pertaining to a pronucleus. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. pronto pronucleus Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language