n. 羊膜

[医] 羊膜

[ noun ]
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
<noun.animal>

Amnion \Am"ni*on\, n. [Gr. ? the membrane round the fetus, dim.
of ? lamb.] (Anat.)
A thin membrane surrounding the embryos of mammals, birds,
and reptiles.