amnion
noun
-ən \
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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
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adjective
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More Definitions for amnion
amnion
noun
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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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