Amnion

[æmniәn]

解释:

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

格伦达整理--From WordNet

解释:

(n.) A thin membrane surrounding the embryos of mammals, birds, and reptiles.

海因里希录入

解释:

n. the innermost membrane enveloping the embryo of reptiles birds and mammals.

手打:波莱特