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Webster 1913 Edition
Amnion
Am′ni-on
,Noun.
[Gr. [GREEK] the membrane round the fetus, dim. of [GREEK] lamb.]
(Anat.)
A thin membrane surrounding the embryos of mammals, birds, and reptiles.
Webster 1828 Edition
Amnion
AM'NIOS
or AM'NION,Noun.
The innermost membrane surrounding the fetus in the womb. It is thin, transparent, soft and smooth on the inside, but rough on the outside.