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Thesaurus: amnion

A thin membrane surrounding the embryos of mammals, birds, and reptiles.

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  1. n. A thin membrane surrounding the embryos of mammals, birds, and reptiles.
  2. n. thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)
  3. A thin membrane surrounding the embryos of mammals, birds, and reptiles.
  4. A thin membrane surrounding the embryos of mammals, birds, andreptiles.
  5. n. thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)