noun[mass noun] Biochemistry
A compound which is an acetic acid derivative of indole, especially one found as a natural growth hormone (auxin) in plants.
- Chemical formula: C8H6(CH3COOH)N; seven isomers; auxin is indole-3-acetic acid
More example sentences
- The plant hormone auxin (indoleacetic acid) plays a role in specifying the pattern of root cells, and mutations affecting its localization lead to root defects.
- In addition, various combinations of the following hormones were also added: naphthylacetic acid, 3 - indoleacetic acid, with 6-benzylaminopurine or kinetin.
- A bacterial substance known as indoleacetic acid may play a part in sprout inhibition.
Definition of indoleacetic acid in:
- The US English dictionary