单词	chorioallantois
释义	chorioallantois noun cho·​rio·​al·​lan·​to·​is ˌkȯr-ē-(ˌ)ō-ə-ˈlan-tə-wəs  : a vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois that in the hen's egg is used as a living culture medium for viruses and for tissues called also chorioallantoic membrane chorioallantoic ˌkȯr-ē-(ˌ)ō-ˌa-lən-ˈtō-ik  adjective Word History Etymology New Latin, from Greek chorion + New Latin allantois First Known Use 1933, in the meaning defined above Medical Definition chorioallantois noun cho·​rio·​al·​lan·​to·​is ˌkōr-ē-ō-ə-ˈlant-ə-wəs, ˌkȯr-  plural chorioallantoides -ō-ˌal-ən-ˈtō-ə-ˌdēz, -ō-ˌal-ˌan-  : a vascular fetal membrane composed of the fused chorion and adjacent wall of the allantois that in the hen's egg is used as a living culture medium for viruses and for tissues called also chorioallantoic membrane
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