1. to fold or turn inward; to form a pouch or pocket by infolding
Usage: chiefly biology and medicine; transitive or intransitive

Examples

• During embryonic development, certain tissues invaginate to form new structures.
• The cells invaginate inward to create the neural tube.
• When the organism is threatened, it can invaginate its outer layer for protection.
• The intestinal wall may invaginate in certain pathological conditions.
• Invaginating tissues fold upon themselves to establish new body cavities.