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| ex·tra·em·bry·o·nic mem·brane [ èkstrə èmbree onik mém bràyn ] (plural ex·tra·em·bry·o·nic mem·branes) |
noun |
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| Definition: |
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membrane outside embryo: a membrane derived from embryonic tissue that lies outside the embryo, e.g. the yolk sac, amnion, and chorion
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