1. folding or turning inward to form a pocket or pouch; pushing inward like a glove turned inside out
Usage: present participle of invaginate; primarily used in biology and medicine

Examples

• During embryonic development, the ectoderm begins invaginating to form the neural tube.
• The tissue was invaginating inward, creating a depression in the cell layer.
• Invaginating membranes can sometimes cause intestinal obstruction in infants.
• The biologist observed the cells invaginating during the gastrulation process.
• When the pouch starts invaginating, it signals the beginning of organ formation.