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1. (n.) amnion
the innermost membrane of the sac surrounding the embryo in reptiles, birds, and mammals, enclosing the amniotic fluid.
Etymology: (1660–70; < Gk
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| Definition of 'amnion' |
Princeton's WordNet |
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1. (noun) amnion, amniotic sac, amnios
thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
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| Definition of 'amnion' |
Webster Dictionary |
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1. (noun) amnion
a thin membrane surrounding the embryos of mammals, birds, and reptiles
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| Definitions of 'amnion' |
The Nuttall Encyclopedia |
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1. amnion
name given to the innermost membrane investing the foetus in the womb.
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| Definition of 'amnion' |
U.S. National Library of Medicine |
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1. amnion
The innermost membranous sac that surrounds and protects the developing embryo which is bathed in the AMNIOTIC FLUID. Amnion cells are secretory EPITHELIAL CELLS and contribute to the amniotic fluid.
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