/ Dictionary / Index A archiblast: Meaning and Definition of Find definitions for: ar•chi•blast Pronunciation: (är'ku-blast"), [key] — n. Biol. the formative part of the egg, as distinguished from the part that nourishes the embryo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. archibenthos archiblastic Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language