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a placenta (such as that of primates) in which the chorion is formed by the fusion of the allantoic mesoderm and vessels to the inner face of the serosa.
Farlex Partner Medical Dictionary © Farlex 2012
A placenta in which the allantoic mesoderm and vessels fuse with the inner face of the serosa to form the chorion.
See also: placenta
Medical Dictionary, © 2009 Farlex and Partners