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primitive streak
n.
An ectodermal ridge in the midline at the caudal end of the embryonic disk from which the intraembryonic mesoderm arises.
Words nearby primitive streak
primitive furrow
,
primitive gut
,
primitive methodist
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primitive node
,
primitive polynomial
,
primitive streak
,
primitivism
,
primitivo
,
primo
,
primo de rivera
,
primo de rivera y orbaneja