chorioallantois
英[kɔ:rɪəʊə\'læntɔɪs]
美[ˌkoʊriˌoʊr\'læntoʊɪs]
基本释义
- n.
- 绒（毛）膜尿囊，尿囊绒膜
英英释义
Noun
1. very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois