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Meaning of hypoblast

hy•po•blast

Pronunciation: (hī'pu-blast"), [key]
— n. Embryol.
  1. the endoderm.
  2. the cells entering into the inner layer of a young gastrula, capable of becoming endoderm and, to a certain extent, mesoderm.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
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