Definition of kinin in English:

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Pronunciation: /ˈkīnən/


1 Biochemistry Any of a group of substances formed in body tissue in response to injury. They are polypeptides and cause vasodilation and smooth muscle contraction.
Example sentences
  • During states of ineffective arterial volume, local production of vasodilatory prostanoids and kinins in the kidney offsets the decrease in renal blood flow and helps maintain the glomerular filtration rate.
  • This same converting enzyme also breaks down kinins, which are powerful vasodilators, and therefore tend to lower the blood pressure.
  • In addition, the release of vasoactive kinins from muscle may interfere with renal hemodynamics.
2 Botany A compound that promotes cell division and inhibits aging in plants. Also called cytokinin.
Example sentences
  • Maybe these cells would differ in sensitivity to auxin or kinin.
  • Coconut milk is recognized as a rich source of plant cell division inducers, which have become known as kinins.
  • Other topical therapies new to the anti-aging scene include plant kinins which appear to have both anti-irritant and photoaging reversal properties with no perceived irritation.


1950s: from Greek kinein 'to move' + -in1.

For editors and proofreaders

Syllabification: ki·nin

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