bombesin definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
a short polypeptide in some animals, esp. in the brain and stomach of a mammal, that stimulates the activity of the nervous, endocrine, and immune systems
bombesin - Medical Definition
A neuropeptide found in brain tissue and at vagal nerve endings in the gastrointestinal mucosa.