IAA is an abbreviation for:

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Indole Acetic Acid

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Definition

What does IAA mean?

indoleacetic acid, IAA(noun)
a plant hormone promoting elongation of stems and roots

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"IAA." Abbreviations.com. STANDS4 LLC, 2013. Web. 22 May 2013. <http://www.abbreviations.com/term/282396>.


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