endorphin

UK:*UK and possibly other pronunciationsUK and possibly other pronunciations/ɛnˈdɔːfɪn/US:USA pronunciation: respellingUSA pronunciation: respelling(en dôr′fin)


WordReference Random House Unabridged Dictionary of American English © 2025
en•dor•phin  (en dôr′fin),USA pronunciation n. 
  1. Biochemistryany 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.
  • end(ogenous) (m)orphine, with -ine respelling, respelled as -in2 1970–75

Collins Concise English Dictionary © HarperCollins Publishers::
endorphin / ɛnˈdɔːfɪn/
  1. any of a class of polypeptides, including enkephalin, occurring naturally in the brain, that bind to pain receptors and so block pain sensation
Etymology: 20th Century: from endo- + morphine
'endorphin' also found in these entries (note: many are not synonyms or translations):
beta-endorphin - enkephalin

Forum discussions with the word(s) "endorphin" in the title:


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