indoleacetic acid

[in-dohl-uh-see-tik, -set-ik, in-]

noun

Biochemistry.

1. a crystalline, water-insoluble powder, C 10 H 9 NO 2 , a natural plant hormone, used especially for stimulating growth and root formation in plant cutting.

indoleacetic acid

/ -ˈsɛtɪk, ˌɪndəʊləˈsiːtɪk /

noun

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

Word History and Origins

Origin of indoleacetic acid¹

First recorded in 1885–90; indole + acetic