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A polypeptide hormone that is produced in the duodenum, especially on contact with acid, and that inhibits gastric secretion of acid and stimulates secretion of bile, insulin, and pancreatic digestive enzymes.
(Physiology) a peptic hormone secreted by the mucosae of the duodenum and jejunum when food passes from the stomach
[C20: from secretion + -in]
a polypeptide hormone, produced in the small intestine, that activates the pancreas to secrete pancreatic juice.
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|Noun||1.||secretin - a gastrointestinal hormone that stimulates the secretion of water and bicarbonate from the pancreas and bile ducts whenever the stomach empties too much acid into the small intestine|