| Noun | 1. | absorbent material - a material having capacity or tendency to absorb another substancesorbent, sorbent material - a material that sorbs another substance; i.e. that has the capacity or tendency to take it up by either absorption or adsorption sponge - a porous mass of interlacing fibers that forms the internal skeleton of various marine animals and usable to absorb water or any porous rubber or cellulose product similarly used absorber - (physics) material in a nuclear reactor that absorbs radiation absorbent cotton - cotton made absorbent by removal of the natural wax |