histidine

[his-ti-deen, -din] /ˈhɪs tɪˌdin, -dɪn/
noun, Biochemistry
1.
an essential amino acid, C 3 H 3 N 2 CH 2 CH(NH 2)COOH, that is a constituent of proteins and is important as the iron-binding site in hemoglobin. Symbol: H.
Abbreviation: His;
Also, histidin
[his-ti-din] /ˈhɪs tɪ dɪn/ (Show IPA).
Origin
1895-1900; hist- + -id3 + -ine2
Examples from the web for histidine
  • The protein in question contains a lot of an amino acid called histidine.
  • Indeed, it has ten times more histidine than the average protein.
British Dictionary definitions for histidine

histidine

/ˈhɪstɪˌdiːn; -dɪn/
noun
1.
a nonessential amino acid that occurs in most proteins: a precursor of histamine
Word Origin and History for histidine
n.

complex amino acid, 1896, from German histidin; see histo- + chemical suffix -idine.

histidine in Medicine

histidine his·ti·dine (hĭs'tĭ-dēn', -dĭn)
n.
Abbr. His
An amino acid that is essential for tissue growth and repair.

histidine in Science
histidine
  (hĭs'tĭ-dēn')   
An amino acid that is essential for children but not for adults. Chemical formula: C6H9N3O2.