plant hormone

Any of various hormones produced by plants that control or regulate germination, growth, metabolism, or other physiological activities. Auxins, cytokinins, gibberellins, and abscisic acid are examples of plant hormones. Also called phytohormone

Nearby words

  1. plant,
  2. plant agreement,
  3. plant bug,
  4. plant city,
  5. plant food,
  6. plant kingdom,
  7. plant louse,
  8. plant out,
  9. plant pathology,
  10. plant-cutter

The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.