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

Amnios :: Amnios (n.) Same as Amnion.

Amniota :: Amniota (n. pl.) That group of vertebrates which develops in its embryonic life the envelope called the amnion. It comprises the reptiles, the birds, and the mammals..

Amniotic :: Amniotic (a.) Of or pertaining to the amnion; characterized by an amnion; as, the amniotic fluid; the amniotic sac..

Anamniotic :: Anamniotic (a.) Without, or not developing, an amnion..

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