a plant hormone, esp. indoleacetic acid, produced in the fruits, seeds, leaves, or stem tips, to promote longitudinal growth and to control bud growth, root formation, leaf abscission, etc.: also produced synthetically
Origin of auxin; from Classical Greek auxein, to increase (see wax) + -in
Any of several plant hormones that regulate various functions, including cell elongation.
Origin of auxinFrom Greek auxein, to grow; see aug- in Indo-European roots.
- (botany) A class of plant growth substance (often called phytohormones or plant hormones) which play an essential role in coordination of many growth and behavioral processes in the plant life cycle.
From Ancient Greek αὐξάνειν (auxanein, “to grow”).