chorio-allantois

英[kɔːri'ːəʊælænt'ɔɪz] 美[kɔːri'ːəʊælænt'ɔɪz]
  • [医]绒[毛]膜尿囊
名词 chorioallantois:
  1. the very vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois