Definitions for iaa
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Princeton's WordNet
indoleacetic acid, IAA(noun)
a plant hormone promoting elongation of stems and roots
Islamic Army of Aden, IAA, Islamic Army of Aden-Abyan, Aden-Abyan Islamic Army(noun)
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
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