1. The process or act of folding inward or turning inside out, especially in biological development.
Usage: primarily used in biology and embryology
2. A structure or part that has been folded inward; an infolded portion of tissue or membrane.
Usage: medical and anatomical term

Examples

• During embryonic development, invagination of the ectoderm forms the neural tube.
• The invagination of the cell membrane allows certain substances to enter the cell.
• Gastrulation involves the invagination of cells to form the three germ layers.
• The invagination process is critical for proper organ formation in vertebrates.
• Scientists studied the invagination patterns to understand developmental abnormalities.