endorphin
en·dorp·hin
noun
1.
a neurochemical occurring naturally in the brain and having analgesic properties
Origin
Borrowed from French endorphine, from endo(gène) (“endogenous, produced within”) and morphine.
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WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). CMU Pronouncing Dictionary. WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.