enkephalin

enkephalin definition - medical

en·keph·a·lin (ĕn-kĕfˈə-lĭn)

noun
Either of two closely related pentapeptides having opiate qualities and occurring especially in the brain and spinal cord.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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