/ Dictionary / Index H hematoblast: Meaning and Definition of Find definitions for: he•mat•o•blast Pronunciation: (hi-mat'u-blast", hē'mu-tu-, hem'u-), [key] — n. an immature blood cell, esp. a red blood cell. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. hemato- hematocele Related Content Daily Word Quiz: sinister Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language