【化】 吲哚醋酸; 吲哚乙酸
【医】 吲哚乙酸, 杂茁长素

[ noun ]
a plant hormone promoting elongation of stems and roots
<noun.substance>

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]