WordNet
indolebutyric acid
n. a synthetic plant hormone promoting elongation of stems and roots
Usage examples of "indolebutyric acid".
Many synthetic compounds have been shown to have auxin activity and are commercially available, such as napthaleneacetic acid (NAA), indolebutyric acid (IBA), and 2,4-dichlorophenoxyacetic acid (2,4 DPA), but only indoleacetic acid has been isolated from plants.