an amorphous form of carbon characterized by high adsorptivity for gases, vapors, and colloidal solids, a porous highly adsorptive form of carbon used to remove colour or impurities from liquids and gases, in the separation and extraction of chemical compounds, and in the recovery of solvents, süsi, mis erilise töötlemise tagajärjel omandab võime imada endasse rohkesti gaase, aure jne, eriti suurepinnaline poorne süsi, kasutatakse peamiselt adsorbendina