chorion
/ˈkɔːrɪɒn/noun
- Embryology the outermost membrane surrounding an embryo of a reptile, bird, or mammal. In mammals (including humans) it contributes to the formation of the placenta【胚】绒毛膜, 卵壳。
派生词
chorionic
adjective词源
mid 16th cent.: from Greek khorion.