1. [ noun ] (biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall
Related terms: growth biology
2. [ noun ] (biology) the folding in of an outer layer so as to form a pocket in the surface
Synonyms: infolding introversion invagination

"the invagination of the blastula"

Related terms: organic_process change_of_shape intussuscept
Similar spelling:   intussuscept