Bezoar

A clump or wad of swallowed food and/or hair.

Bezoars can sometimes be found to cause blockage of the digestive system, especially at the exit of the stomach.

When a bezoar is composed of hair, it is referred to as a hairball or trichobezoar.

When a bezoar is composed of vegetable materials, it is referred to as a phytobezoar or foodball.

When a bezoar is composed of hair and food it is referred to as a trichophytobezoar or hairy foodball.

Interestingly, in the Far East culture, bezoars are felt to have medicinal properties!