/ Dictionary / Index E erythroblast: Meaning and Definition of Find definitions for: e•ryth•ro•blast Pronunciation: (i-rith'ru-blast"), [key] — n. Anat. a nucleated cell in the bone marrow from which red blood cells develop. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: erythroblast (Thesaurus) erythro- erythroblastosis Related Content Daily Word Quiz: divulge Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language