Medical Dictionary

amnion


amnion

noun am·ni·on \ˈam-nē-ˌän, -ən\
plural amnions or am·nia \-nē-ə\

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
February 27, 2015
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