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auxin Syllabification: aux·in
Pronunciation: /ˈôksən/

Definition of auxin in English:


A plant hormone that causes the elongation of cells in shoots and is involved in regulating plant growth.
Example sentences
  • Falling levels of plant hormones such as auxin and the cytokinins are responsible.
  • Hormones such as auxins and gibberellins trigger fruit cells to expand.
  • New links to the plant hormone, auxin, were also uncovered.


1930s: coined in German from Greek auxein 'to increase' + -in1.

Definition of auxin in:
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