histaminase

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noun

A widely occurring flavoprotein enzyme that oxidizes histamine and various diamines.

OriginEnglish diastase ← Ancient Greek δῐᾰ́στᾰσῐς (dĭắstăsĭs) →
Scrabble 16
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Meanings

nounhistaminase (plural histaminases)

plural histaminases

  1. biochemistryA widely occurring flavoprotein enzyme that oxidizes histamine and various diamines.

    We suggest, however, that the substance, or system, which produces a change in structure responsible for the loss of physiological activity of histamine be designated histaminase.

    1930 December 4, C. H. Best, E. W. McHenry, “The inactivation of histamine”, in The Journal of Physiology

Origin

  1. Englishhistamine
  2. Ancient Greekδῐῐ̈́στημῐ (dĭĭ̈́stēmĭ)
  3. Ancient Greekδῐᾰ́στᾰσῐς (dĭắstăsĭs)
  4. Englishdiastase
  5. Englishhistaminase

From histamine + -ase.

Full word history & related roots →
Cite this entry
APA

histaminase. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/histaminase

MLA

“histaminase.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/histaminase. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “histaminase,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/histaminase.

Source: histaminase on Wiktionary, CC BY-SA 4.0.