1. polypeptide hormone secreted by the mucous lining of the stomach; when peptides and amino acids are present in the small intestine the secretion of gastric acid is stimulated;
WordNet (r) 3.0 (2006):
gastrin
n 1: polypeptide hormone secreted by the mucous lining of the
stomach; when peptides and amino acids are present in the
small intestine the secretion of gastric acid is stimulated