/ Dictionary / Index N neuroblast: Meaning and Definition of Find definitions for: neu•ro•blast Pronunciation: (noor'u-blast", nyoor'-), [key] — n. an immature nerve cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: neuroblast (Thesaurus) neurobiology neuroblastoma Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language