chorioallantois

from WordNet (r) 3.0 (2006)

chorioallantois
    n 1: the very vascular fetal membrane composed of the fused
         chorion and adjacent wall of the allantois [syn:
         {chorioallantois}, {chorioallantoic membrane}]

from The Collaborative International Dictionary of English v.0.48

chorioallantois \chorioallantois\ n.
   a very vascular fetal membrane composed of the fused chorion
   and adjacent wall of the allantois.

   Syn: chorioallantoic membrane.
        [WordNet 1.5]

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