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2 definitions found
 for IAA
From The Collaborative International Dictionary of English v.0.48 :

  IAA \IAA\ n.
     Indoleacetic acid, a plant hormone promoting elongation of
     stems and roots. [Acronym]
  
     Syn: indoleacetic acid.
          [WordNet 1.5]

From The Collaborative International Dictionary of English v.0.48 :

  indoleacetic acid \in"dole*a*cet"ic ac"id\ ([i^]n"d[=o]l), n.
     (Chem., Bot.)
     A plant hormone ({C10H9NO2) recognized as the principle
     growth regulator in higher plants; called also heteroauxin.
     Abbreviated IAA. Chemically it is 1H-indole-3-acetic acid.
     [PJC]

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