amnion

noun am·ni·on \ ˈam-nē-ˌän , -ən \

Definition of amnion

plural amnions or amnia play \-nē-ə\
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

amniotic

play \ˌam-nē-ˈä-tik\ adjective

Origin and Etymology of amnion

New Latin, from Greek, caul, from amnos lamb — more at yean


Medical Dictionary

amnion

noun am·ni·on \ ˈam-nē-ˌän, -ən \

medical Definition of amnion

plural amnions or amnia play \-nē-ə\
: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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