gastrula
1. [ noun ] (zoology,embryology) double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm
Related terms: embryo archenteron
Similar spelling:   Gaster
  gastralgia
  gastrin
  gastric
  gagster
  Gastropoda
  gastromy