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