pancreas definition
pancreas-a large elongated exocrine gland located behind the stomach; secretes pancreatic juice and insulin. duct gland, exocrine, exocrine gland-a gland that secretes externally through a duct.ancreas. A tongue-shaped gland located in the abdomen that produces glucagon, insulin, and pancreatic juice. See glucagon, insulin, pancreatic islets, pancreatic juice.