Outside the embryonic body; e.g., those membranes involved with the embryo's protection and nutrition which are discarded at birth without being incorporated in its body.
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ex·tra·em·bry·on·ic -.em-brē-'än-ik adj situated outside the embryo proper esp developed from the zygote but not part of the embryo <\extraembryonic membranes>
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ex·tra·em·bry·on·ic (eks″trə-em″bre-onґik) external to the embryo proper, as the extraembryonic coelom or extraembryonic membranes. Cf. intraembryonic.Medical dictionary. 2011.