enkephalin

HYPHEN

en=keph=a=lin

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WORDNET DICTIONARY

Noun enkephalin has 1 sense

enkephalin(n = noun.substance) Array - an endorphin having opiate qualities that occurs in the brain and spinal cord and elsewhere; Array

is a kind of

endorphin

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OXFORD DICTIONARY

enkephalin, n. (also encephalin) Biochem. either of two morphine-like peptides occurring naturally in the brain and thought to control levels of pain.

Etymology

Gk egkephalos brain

For further exploring for "enkephalin" in Webster Dictionary Online