SINCE 1828
amnion
noun
am·ni·on
| \ ˈam-nē-ˌän
, -ən\
, -ən\
plural amnions
or amnia\ -nē-ə
\
\
Definition of amnion
1
: a thin membrane forming a closed sac about the embryos or fetuses of reptiles, birds, and mammals and containing the amniotic fluid
2
: a membrane analogous to the amnion and occurring in various invertebrates
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Other Words from amnion
amniotic
\ ˌam-nē-ˈä-tik
\
adjective
\
adjective
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More Definitions for amnion
amnion
noun
am·ni·on
| \ ˈam-nē-ˌän, -ən
\
\
plural amnions
or amnia\ -nē-ə
\
\
Medical Definition of amnion
: a thin membrane forming a closed sac about the embryos and fetuses of reptiles, birds, and mammals and containing the amniotic fluid
— called also amniotic sac
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