'indoleacetic acid' definitions:
Definition of 'indoleacetic acid'
From: WordNet
noun
A plant hormone promoting elongation of stems and roots [syn: indoleacetic acid, IAA]
Definition of 'indoleacetic acid'
From: GCIDE
- 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]