Bursa omentalis is a small sac-like structure in the human body that is found in the lesser omentum. Synonyms for this term include bursa of the lesser sac, lesser sac bursa, omental bursa, bursa major, and bursa omenti. These terms describe the same structure, which plays a role in lubricating and cushioning organs in the abdomen. The bursa omentalis is located between the stomach and the liver and is connected to the larger peritoneal cavity. Understanding the synonyms for this term can be useful when studying the anatomy and physiology of the digestive system.