单词	chorioallantoic
释义	chorioallantoic /ˌkɔːrɪəʊˌalənˈtəʊɪk / /ˌkɒrɪəʊˌalənˈtəʊɪk/ adjective Embryology Relating to or denoting fused chorionic and allantoic membranes around a fetus.Four, 10 to 15 day old embryonated chicken eggs were each inoculated via dropped chorioallantoic membranes with 0.1 mL of sample and incubated at 37 deg C as described by Senne.... These differ from the chorioallantoic placentae of placentals, however, in that they have no villi, which effectively reduces the intimacy of contact between fetus and mother. Whenever possible, isolation via the propagation of virus on chorioallantoic membranes of chicken embryos should be used as the definitive diagnosis of choice.
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