amnion Phys.
(ˈæmnɪən)
[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 Midw. 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 tr. Haeckel's Evol. Man II. xviii. 133 All known Amnion Animals, coincide in many important points of organization and development. |