iaa meaning and definition

IAA noun

Definition of IAA (noun)

1. a plant hormone promoting elongation of stems and roots
   • synonyms: indoleacetic acid
2. 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: Aden-Abyan Islamic Army, Islamic Army of Aden, Islamic Army of Aden-Abyan