adsorption
Cross references: 1. absorption ad.sorp.tion \ad-'so.rp-sh*n, -'zo.rp-\ \-'so.rp-tiv, -'zo.rp-\ n [irreg. fr. adsorb] : the adhesion in an extremely thin layer of molecules (as of gases, solut es, or liquids) to the surfaces of solid bodies or liquids with which they are in contact - ad.sorp.tive aj