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extraembryonic |
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extraembryonic /ex·tra·em·bry·on·ic/ (eks″trah-em″bre-on´ik) external to the embryo proper, as the extraembryonic coelom or extraembryonic membranes.
extraembryonic external to the embryo proper, as the extraembryonic celom or the extraembryonic membranes. extraembryonic membranes the fetal membranes, chorion, amnion, allantois, yolk sac; term used mostly in the early embryonic period. |
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the product of the union of oocyte and spermatozoon at any stage of development from fertilization until birth, including extraembryonic membranes as well as the embryo or fetus. the product of the union of oocyte and spermatozoon at any stage of development from fertilization until birth, including extraembryonic membranes as well as the embryo or fetus. external to the embryo proper, as the extraembryonic coelom or extraembryonic membranes. |
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