Etymology

endorphin

E1N1D2O1R1P3H4I1N1

Today it means: Any of a group of peptide hormones found in the mammalian brain that act as neurotransmitters and have properties similar to morphine. Full definition →

French endorphine
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The story

  1. French · borrowed fromendorphine
  2. English todayendorphin

Borrowed from French endorphine, from endo(gène) (“endogenous, produced within”) and morphine.

Etymology from Wiktionary, CC BY-SA 4.0.