The thinned-out trophoblastic membrane over the embryonic disk in developing carnivores and ungulates, outermost cell layer which helps form the blastodisk; called blastodermic or primitive ectoderm.
(05 Mar 2000)
rattlewort, rattoon, Rattus, Rauber, August < Prev | Next >
raucousness, Rau, Johann, Rauscher, F.J.
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