Definition of auxin in English:


Syllabification: aux·in
Pronunciation: /ˈôksin


  • A plant hormone that causes the elongation of cells in shoots and is involved in regulating plant growth.
    More 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.

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elaborate ornamentation of a vocal melody