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A hormone that is secreted by cells in the stomach and promotes hunger before an expected meal, decreases in amount after eating, and promotes secretion of growth hormone.

[Coined by its discoverers from ghrē-, reconstructed Proto-Indo-European root of English grow; see grow + -in (probably influenced by g(rowth)-h(ormone)-rel(easing peptide), a description of ghrelin's function and chemical composition).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Biochemistry) a hormone produced in the body that stimulates appetite
[C20: from g(rowth) h(ormone) rel(easing) + -in]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.ghrelin - a gastrointestinal hormone produced by epithelial cells lining the fundus of the stomach; appears to be a stimulant for appetite and feeding, but is also a strong stimulant of growth hormone secretion from the anterior pituitary
gastrointestinal hormone, GI hormones - hormones that affect gastrointestinal functioning
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
Other innovations listed by Dr Groh included liners that decrease absorption from the small intestine, and devices that affect receptors for the hormone grehlin, which helps regulate appetite and also the distribution and rate of use of energy.
Postprandial insulin, grehlin and glucose levels were statistically equivalent between D40 and D10.
Yacon Syrup has also been shown to lower levels of the hunger hormone grehlin, and could have far-reaching effects in helping reduce obesity.