n. [ Gr. &unr_; the membrane round the fetus, dim. of &unr_; lamb. ] (Anat.) A thin membrane surrounding the embryos of mammals, birds, and reptiles. [ 1913 Webster ]
n. Same as Amnion. [ 1913 Webster ]
‖n. pl. [ NL. See Amnion. ] (Zool.) That group of vertebrates which develops in its embryonic life the envelope called the amnion. It comprises the reptiles, the birds, and the mammals. [ 1913 Webster ]
n.
a. [ Cf. F. amniotique. ] (Anat.) Of or pertaining to the amnion; characterized by an amnion;
Amniotic acid. (Chem.) [ R. ]