indoleacetic acid

noun Biochemistry.

  1. a crystalline, water-insoluble powder, C10H9NO2, a natural plant hormone, used especially for stimulating growth and root formation in plant cutting.


  1. an auxin that causes elongation of the cells of plant stems. Formula: C 10 H 9 NO 2Abbreviation: IAA


  1. A plant hormone that stimulates growth.

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