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.
Definition of auxin in:
- The British & World English dictionary