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essential amino acid

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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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Origin of essential amino acid

First recorded in 1935–40
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

essential amino acid in Medicine

essential amino acid

n.
  1. An alpha-amino acid that is required for protein synthesis but cannot be synthesized by humans and must be obtained in the diet.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.