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amnion

play
noun am·ni·on \ˈam-nē-ˌän, -ən\

Definition of amnion

plural

amnions

or

amnia

play \-nē-ə\
  1. 1 :  a thin membrane forming a closed sac about the embryos or fetuses of reptiles, birds, and mammals and containing the amniotic fluid

  2. 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


First Known Use: 1667


Medical Dictionary

amnion

play
noun am·ni·on \ˈam-nē-ˌän, -ən\

Medical Definition of amnion

plural

amnions

or

amnia

\-nē-ə\play
  1. :  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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