1. (noun)
indoleacetic acid, IAA
- a plant hormone promoting elongation of stems and roots Synonyms: indoleacetic acid
2. (noun)
Islamic Army of Aden, IAA, Islamic Army of Aden-Abyan, Aden-Abyan Islamic Army
- Yemen-based terrorist group that supports al-Qaeda's goals; seeks to overthrow the Yemeni government and eliminate United States interests; responsible for bombings and kidnappings and killing western tourists in Yemen Synonyms: indoleacetic acid