/ Dictionary / Index E extraembryonic: Meaning and Definition of Find definitions for: ex•tra•em•bry•on•ic Pronunciation: (ek"stru-em"brē-on'ik), [key] — adj. situated outside the embryo. pertaining to structures outside the embryo. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. extradosed extraembryonic membrane Related Content Daily Word Quiz: supercilious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language