卵
黃
囊
卵
黃
囊
Definitions3 characters (ectodermal attaching development placenta)
Usage•••frequent
Pronunciations
卵
黃
囊
As word
1yolk sac (ectodermal cells attaching fetus to uterus before the development of the placenta)
2yolk sac (ectodermal cells attaching fetus to uterus before the development of the placenta)
3yolk sac (ectodermal cells attaching fetus to uterus before the development of the placenta)