Indolebutyric acid is a plant hormone that promotes root growth in cuttings. It is also known as IBA and its chemical formula is C12H13NO2. There are several synonyms for indolebutyric acid including 3-(indol-3-yl) butyric acid, indole-3-butyric acid, and 1H-indole-3-butanoic acid. These synonyms all refer to the same compound and are commonly used interchangeably in scientific literature. Indolebutyric acid is a valuable tool for propagating plants, especially those that are difficult to root, and is commonly used by horticulturalists and researchers alike. Understanding the various synonyms for indolebutyric acid is important for those working in the fields of plant science and agriculture.