#adsorption__surface_assimilation__surfaceassimilation  the accumulation of molecules of a gas to form a thin film on the surface of a solid
  supertype:  sorption  the process in which one substance takes up or holds another (by either absorption or adsorption)
  subtype:  chemisorption  adsorption (especially when irreversible) by means of chemical instead of physical forces; "chemisorption of gaseous nitrogen on iron catalysts"

No statement uses or specializes adsorption; click here to add one.