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essential amino acid

noun

, Biochemistry.
  1. any amino acid that is required by an animal for growth but that cannot be synthesized by the animal's cells and must be supplied in the diet.

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Word History and Origins

Origin of essential amino acid1

First recorded in 1935–40

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Example Sentences

The premise is this: turkey is chock-full of a soporific essential amino acid, tryptophan, one of the 22 essential amino acids.

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