Thick semifluid mass of partly digested food and secretions, formed in the stomach and intestines during digestion. Its composition changes as various digestive juices and cellular debris and other waste products are added, and water and nutrients are absorbed from it during its passage through the digestive tract, at the end of which it is stored for excretion
a semiliquid mass of partially digested food that passes from the stomach through the pyloric sphincter into the duodenum