/ Dictionary / Index N nucleoplasm: Meaning and Definition of Find definitions for: nu•cle•o•plasm Pronunciation: (n'klē-u-plaz"um, ny'-), [key] — n. Cell Biol. the protoplasm of the nucleus of a cell. Also called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: nucleoplasm (Thesaurus) nucleophilic nucleoprotein Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language