Classification of plant hormones or plant-growth regulators with some #1excludeGlossary characteristics. Auxins generally promote cell elongation and inhibit lateral branching. Moreover, they also serve an important role in positive phototropism which is the plant\’s ability to bend toward the light.
Merriam-Webster Online Dictionary
auxin (noun)1.
any of various usually acidic organic substances that promote cell elongation in plant shoots and usually regulate other growth processes (as root initiation) as
a) - indoleacetic acid
b) any of various synthetic substances (as 2,4-D) resembling indoleacetic acid in activity and used especially in research and agriculture
2.
- plant hormone
Phytohormone, Plant Hormone, Growth Regulator, Indole-3-Acetic Acid, IAA