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English definition of “endorphin”

endorphin

noun [C]     /enˈdɔː.fɪn/ US  /-ˈdɔːr-/ specialized
a chemical naturally released in the brain to reduce pain , that in large amounts can make you feel relaxed or full of energy Animal biochemistry
(Definition of endorphin noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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