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Medical Definition of Choriovitelline placenta
1. A placenta (seen in some lower animals) in which the chorion is formed by the fusion of yolk-sac mesoderm and vessels to the inner face of the serosa. (05 Mar 2000)
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1. A placenta (seen in some lower animals) in which the chorion is formed by the fusion of yolk-sac mesoderm and vessels to the inner face of the serosa. (05 Mar 2000)