Phys. [a. Gr. ἀμνίον the caul, dim. of ἀμνός lamb.] The innermost membrane enclosing the fœtus before birth.
1667. Phil. Trans., II. 511. The Fœtus is nourished only from the Amnion by the Mouth.
1764. Smellie, Midwif., I. 114. The Chorion is on the inside lined with another membrane called Amnion.
1863. Baring-Gould, Iceland, 127. The clerestory windows covered with the amnion of sheep.
b. attrib.
1879. trans. Haeckel’s Evol. Man, II. xviii. 133. All known Amnion Animals, coincide in many important points of organization and development.
