Definition of histidine in English:


Line breaks: his|ti¦dine
Pronunciation: /ˈhɪstɪdiːn


[mass noun] Biochemistry
  • A basic amino acid which is a constituent of most proteins. It is an essential nutrient in the diet of vertebrates, and is the source from which histamine is derived in the body.
    • Chemical formula: C6H9N3O2
    More example sentences
    • The most prevalent amino acid is cysteine with other major ones including tyrosine, histidine, lysine and arginine.
    • In humans, histamine is synthesized from histidine, a conditionally-essential amino acid.
    • The amount of the amino acids threonine, proline and histidine were also increased in roots of slag-cultivated maize plants.


late 19th century: from Greek histos 'web, tissue' + -ide + -ine4.

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