ଅର୍ଥ : The folding in of an outer layer so as to form a pocket in the surface.
							ଉଦାହରଣ : 
							The invagination of the blastula.
							
ସମକକ୍ଷ : infolding, introversion, invagination
ଅର୍ଥ : (biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall.