Met enkephalin

or Met-en·keph·a·lin


noun (sometimes lowercase)

See under enkephalin.

Origin of Met enkephalin

First recorded in 1975–80



noun Biochemistry.

either of two pentapeptides that bind to morphine receptors in the central nervous system and have opioid properties of relatively short duration; one pentapeptide (Met enkephalin) has the amino acid sequence Tyr-Gly-Gly-Phe-Met and the other (Leu enkephalin) has the sequence Tyr-Gly-Gly-Phe-Leu.

Origin of enkephalin

1970–75; < Greek enképhal(os) encephalon + -in2 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

British Dictionary definitions for metenkephalin


encephalin (ɛnˈsɛfəlɪn)


a chemical occurring in the brain, having effects similar to those of morphineSee also endorphin
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for metenkephalin




An enkephalin that has a terminal methionine residue and occurs naturally as one of two such pentapeptides that are formed in the brain.




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

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.