羊膜動物; 羊膜類
Amniota \Am`ni*o"ta\, n. pl. [NL. See {Amnion}.] (Zo["o]l.) That group of vertebrates which develops in its embryonic life the envelope called the amnion. It comprises the reptiles, the birds, and the mammals.
Amniota n : higher vertebrates (reptiles, birds and mammals) possessing an amnion during development