be·​ta-en·​dor·​phin ˈbā-tə-en-ˈdȯr-fən How to pronounce beta-endorphin (audio)
: an endorphin of the pituitary gland having a much greater analgesic potency than morphine

Examples of beta-endorphin in a Sentence

Recent Examples on the Web Unlike caffeine, nicotine increases beta-endorphins and helps relieve anxiety. Jeffrey A. Singer, National Review, 1 Feb. 2024 Another study shows that changes in the brain's structure raise serotonin, beta-endorphins and other neurotransmitters. Kelly Santana Banks, Discover Magazine, 7 Mar. 2023

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Word History

First Known Use

1976, in the meaning defined above

Time Traveler
The first known use of beta-endorphin was in 1976

Dictionary Entries Near beta-endorphin

Cite this Entry

“Beta-endorphin.” Dictionary, Merriam-Webster, Accessed 17 Jul. 2024.

Medical Definition


: an endorphin of the pituitary gland with much greater analgesic potency than morphine that occurs free and as the terminal sequence of 31 amino acids in the polypeptide chain of beta-lipotropin

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