Final answer:
The term for partially digested food leaving the stomach is chyme, which results from the mixing of food with gastric juices, including pepsin for protein digestion.
Step-by-step explanation:
The term that refers to the partially digested food leaving the stomach is chyme. When food enters the stomach, it is mechanically and chemically digested. The food is mixed with gastric juices, containing enzymes like pepsin which is crucial for protein digestion. This mixture of partially digested food and stomach juices is called chyme, which then slowly passes into the small intestine and is further digested with the help of bile and pancreatic juices. The movement of chyme is regulated by the pyloric sphincter along with hormones and muscular reflexes to ensure optimal digestion in the small intestine.