iaa

Noun iaa has 2 senses

• iaa(n = noun.substance) indoleacetic acid - a plant hormone promoting elongation of stems and roots;
is a kind of auxin

• iaa(n = noun.group) aden-abyan islamic army, islamic army of aden, islamic army of aden-abyan - 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;
is a kind of foreign terrorist organization, fto, terrorist group, terrorist organization