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1. The folding in of an outer layer so as to form a pocket in the surface
   "the intussusception of the blastula";
   - invagination, introversion, infolding
    
2. (biology) growth in the surface area of a cell by the deposit of new particles between existing particles in the cell wall

Derived forms: intussusceptions

Type of: biological process, development, growing, growth, maturation, ontogenesis, ontogeny, organic process

Encyclopedia: Intussusception