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| en·dor·phin [ en dáwrfin ] (plural en·dor·phins) |
noun |
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| Definition: |
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natural painkiller: a substance in the brain that attaches to the same cell receptors that morphine does. Endorphins are released when severe injury occurs, often abolishing all sensation of pain.
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| [Late 20th century. Blend of endogenous + morphine] |
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