endorphin








noun

  1. any of a group of peptides occurring in the brain and other tissues of vertebrates, and resembling opiates, that react with the brain’s opiate receptors to raise the pain threshold.

noun

  1. any of a class of polypeptides, including enkephalin, occurring naturally in the brain, that bind to pain receptors and so block pain sensation
n.

1975, from French endorphine, from endogène “endogenous, growing within” (see endo- + genus) + (mo)rphine.

n.

  1. Any of a group of peptide hormones that bind to opiate receptors and are found mainly in the brain. Endorphins reduce the sensation of pain and affect emotions.

  1. Any of a group of peptide substances secreted by the anterior portion of the pituitary gland that inhibit the perception of painful stimuli. Endorphins act as neurotransmitters in the pain pathways of the brain and spinal cord. Narcotic drugs may stimulate the secretion of endorphins.
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