Definition of gastrin in US English:



  • A hormone which stimulates secretion of gastric juice and is secreted into the bloodstream by the stomach wall in response to the presence of food.

    • ‘These tumors, called gastrinomas, secrete large amounts of the hormone gastrin, which causes excessive production of acid by your stomach, leading to peptic ulcers.’
    • ‘Stains for glucagon, gastrin-releasing peptide, and gastrin were negative.’
    • ‘It's a complex story involving what may be misguided notions of why we have acid in the stomach in the first place, and the role of a hormone called gastrin.’
    • ‘The molecule closely simulates the hormone gastrin, which is involved with hydrochloric acid secretion.’
    • ‘The tumors secrete the hormone gastrin, which results in excess acid production and often peptic ulcer disease.’


Early 20th century: from gastric + -in.