Noun: chorioallantois ,ko-ree-ow-u'lan-tow-is
- The very vascular foetal membrane composed of the fused chorion and adjacent wall of the allantois
"The chorioallantois is important for gas exchange in bird embryos";
- chorioallantoic membrane
Derived forms: chorioallantoises
Type of: membrane, tissue layer
Encyclopedia: Chorioallantois