gastrulation
/ˌɡæstrəˈleɪʃən/
noun
- A key stage in embryonic development when the single-layered blastula reorganizes into a multilayered structure called the gastrula.
- Errors during gastrulation can lead to serious birth defects.
- The biology class studied the stages of gastrulation in sea urchins.
- Gastrulation is a critical step in the formation of all animal embryos.