English noun: gastrula | |||
| 1. | gastrula (animal) 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 | ||
| Broader (hypernym) | conceptus, embryo, fertilized egg | ||
| Part holonym | archenteron | ||