Etymology

amino acid

Today it means: Any organic compound containing both an amino and a carboxylic acid functional group. Full definition →

German Aminosäure
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The story

  1. German · calque ofAminosäure
  2. English todayamino acid

See amine and acid. Likely a calque of German Aminosäure, which is attested earlier.

Etymology from Wiktionary, CC BY-SA 4.0.