an endorphin that occurs at nerve endings and may serve as a neurotransmitter
Either of two closely related pentapeptides having opiate qualities and occurring in the brain, spinal cord, and other parts of the body.
Origin of enkephalinGreek enkephalos in the head ( en- in ; see en in Indo-European roots.) ( kephalē head ; see ghebh-el- in Indo-European roots.) -in
From Ancient Greek ἐγκέϕαλος (enkeϕalos, “brain”) + -in.