Stomach

The stomach is a muscular, hollow, dilated part of the digestion system which functions as an important organ of the digestive tract in some animals, including vertebrates, echinoderms, insects (mid-gut), and molluscs. It is involved in the second phase of digestion, following mastication (chewing).
The stomach is located between the esophagus and the small intestine. It secretes protein-digesting enzymes and strong acids to aid in food digestion, (sent to it via oesophageal peristalsis) through smooth muscular contortions (called segmentation) before sending partially digested food (chyme) to the small intestines.

Steatorrhea

Steatorrhea is a condition where a substantial amount of fat is found in the feces. The presence of excess fat in feces means that malabsorption is occurring, where food is not properly absorbed from the gut. Typically, the stools float and are bulky, foul-smelling and pale in color. Droplets of oil may be visible, remaining apparent even after the toilet has been flushed, leaving a greasy deposit around the bowl. Steatorrhea is indicative of certain diseases, such as chronic pancreatitis or celiac disease, and is often associated with anemia.