gastrulating
/ˈɡæstrəˌleɪtɪŋ/
verb
- The process during embryonic development in which the blastula folds inward to form a gastrula, establishing the three germ layers.
- When the embryo starts gastrulating, the future body plan begins to take shape.
- Scientists observed the frog embryo gastrulating under the microscope.
- The embryo is gastrulating as cells begin to migrate inward.