The term "cat litter" refers to a type of absorbent material that is used for cleaning and maintaining sanitation in areas where cats are kept, such as their litter box. It typically consists of small granules or clay pellets that can easily be scooped out after the cat has done its business. The purpose of using this type of material is to absorb and contain any waste produced by the animal, making it easier for pet owners to clean up and maintain a hygienic environment for their cats.