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Amino Acid

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Definition of the noun amino acid

What does amino acid mean as a name of something?


  1. organic compounds containing an amino group and a carboxylic acid group
    • example: proteins are composed of various proportions of about 20 common amino acids
    • lexical domain: Substances - nouns denoting substances
    • synonym of amino acid: aminoalkanoic acid
    • more generic term: organic compound = any compound of carbon and another element or a radical
    • more specific terms:
      • alanine = a crystalline amino acid that occurs in many proteins
      • asparagine = a crystalline amino acid found in proteins and in many plants
      • aspartic acid = a crystalline amino acid found in proteins and occurring naturally in sugar beets and sugar cane
      • canavanine = an amino acid found in the jack bean
      • citrulline = an amino acid that does not occur in proteins but is an intermediate in the conversion of ornithine to arginine
      • cysteine = an amino acid containing sulfur that is found in most proteins
      • cystine = a crystalline amino acid found in proteins
      • dihydroxyphenylalanine / dopa = amino acid that is formed in the liver and converted into dopamine in the brain
      • essential amino acid = an amino acid that is required by animals but that they cannot synthesize
      • gamma aminobutyric acid / GABA = an amino acid that is found in the central nervous system
      • glutaminic acid / glutamic acid = an amino acid occurring in proteins; important in the nitrogen metabolism of plants
      • glutamine = a crystalline amino acid occurring in proteins
      • glycine = the simplest amino acid found in proteins and the principal amino acid in sugar cane
      • hydroxyproline = a crystalline amino acid obtained from gelatin or collagen
      • iodoamino acid = an amino acid with iodine added
      • ornithine = an amino acid that does not occur in proteins but is important in the formation of urea
      • proline = an amino acid that is found in many proteins
      • creatine / creatin = an amino acid that does not occur in proteins but is found in the muscle tissue of vertebrates both in the free form and as phosphocreatine
      • sarcosine = a sweetish crystalline amino acid
      • serine = a sweetish crystalline amino acid involved in the synthesis by the body of cysteine
      • thyronine = a phenolic amino acid of which thyroxine is a derivative
      • tyramine = amino acid derived from tyrosine; has a sympathomimetic action
      • tyrosine = an amino acid found in most proteins
    • substance of: protein = any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues

Alternative definition of the noun amino acid


  1. [organic chemistry] Any organic compound containing both an amino and a carboxylic acid functional group.
  2. [biochemistry] Any of the twenty naturally occurring α-amino acids (having the amino, and carboxylic acid groups on the same carbon atom), and a variety of side chains, that combine, via peptide bonds, to form proteins.


Amino Acid: Any organic compounds containing amino and carboxyl groups. In biochemistry, used to refer to the twenty-plus L-alpha-amino acids found in proteins.

Phrases with Amino Acid

  1. Deduced Amino Acid Sequence
  2. Beta-Amino Acid
  3. Alpha-Amino Acid
  4. essential amino acid
  5. Nonessential Amino Acid

Printed dictionaries and other books with definitions for Amino Acid

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Google previewNutrition and Diet Therapy Reference Dictionary (2012)

by Rosalinda T. Lagua, Virginia S. Claudio

Also called conditionally indispensable amino acid. An amino acid that becomes indispensable under certain conditions, such as severe stress, sepsis, and thermal injury. Arginine, cysteine, glutamine, taurine and tyrosine, are conditionally ...

Google previewCRC Dictionary of Agricultural Sciences (2001)

by Robert Alan Lewis

amino acid (aminoalkanoic acid; AA; aa). any of a class of organic acids (but see basic amino acid, below) that contains both the amino (NH2) and carboxyl ...

Google previewEncyclopedia of Animal Science (Print) (2004)

by Wilson G. Pond

INTRODUCTION An amino acid contains both amino and acid groups. The names for amino acids are largely derived from Greek (e.g., glycine from the Greek ...

Google previewEncyclopedia of Astrobiology (2011)

by Muriel Gargaud

α-Amino-n-butyric acid β-Amino-n-butyric acid γ-Amino-n-butyric acid COOH NH2 COOH NH2 COOH H2N Amino Acid. Figure 1 Generalized structural formulas for a-, b-, and g-amino acids A A A Aminonitrile. Figure 1 Strecker amino acid ...

Google previewRÖMPP Encyclopedia Natural Products, 1st Edition, 2000 (2014)

by Burkhard Fugmann, Susanne Lang-Fugmann, Wolfgang Steglich

was isolated as the first natural amino acid from the juice of asparagus ( Asparagus officinalis) and later from various plants such as shoots of vetch, lupines, soy beans, etc. Free Asn sometimes serves as a storage form for nitrogen in plants.

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Quotes about Amino Acid

It now seems certain that the amino acid sequence of any protein is determined by the sequence of bases in some region of a particular nucleic acid molecule. (Francis Crick)
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Anagrams of AMINO ACID

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