Source : WordNet®

IAA
     n 1: a plant hormone promoting elongation of stems and roots
          [syn: {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 killling Western tourists in Yemen [syn: {Islamic
        Army of Aden}, {Islamic Army of Aden-Abyan}, {Aden-Abyan
        Islamic Army}]